Preliminary implementation of a RESCALE_WEIGHTS configuration switch.

Added new ASSOCCOORD_TYPE configuration parameter for ASSOCiating detections either in PIXEL or WORLD coordinates.
Fixed sampling issues for Sersic, de Vaucouleurs and exponential model-fitting.
Version number pushed to 2.13.2.

Fixed issue with output Check-image headers when reading individual extensions from MEFs (thanks to user Lantern for the bug report).

Removed unused variables in poly.c.
Fixed issue with invalid comment in XSL stylesheet.

Pushed version number to 2.13.1.

Added more complete headers to all files.
Clarified licensing issues.
Updated FITS library.
Updated configuration files.
Added configuration files to the list of data that get installed in ${prefix}/share/sextractor.
Added background offset and point-source model components: FLUX_BACKOFFSET,FLUXERR_BACKOFFSET,FLUX_POINTSOURCE,FLUXERR_POINTSOURCE,MAG_POINTSOURCE,MAGERR_POINTSOURCE.
Tweaked model-fitting convergence parameters.
Fixed catalogue source ordering/number issue in dual-image mode.
Pushed version number to 2.13.0.

Pushed version number to 2.12.3.

Changed the management of tolerances in Hessian inversion SVD.
Pushed Lanczos interpolator to 4th order in PSF and model-fitting.
Normalized the interpolating function so that the DC component gain is 1.
Pushed version number 2.12.2.

Fixed model-fitting issue with empty images in dual-image mode (thanks to V. de Lapparent for reporting).
Updated LevMar to version 2.5.
Updated URLs in various places.
Pushed version number to 2.12.1.

Added --disable-model-fitting configure option to turn-off model-fitting features and to allow compiling SExtractor without requiring the ATLAS and FFTW libraries.
Version number pushed to 2.12.0.

Added  POLAR1ERRMODEL_WORLD,POLAR2ERRMODEL_WORLD,POLARCORRMODEL_WORLD,ELLIP1ERRMODEL_WORLD,ELLIP2ERRMODEL_WORLD and ELLIPCORRMODEL_WORLD measurement parameters.

Fixed TFORM error message in fitshead.c (thanks to S.Guieu).
Fixed model-fitting error variance/covariance issue (bug in matrix inversion).
Added ELLIP1ERRMODEL_IMAGE, ELLIP2ERRMODEL_IMAGE, ELLIPCORRMODEL_IMAGE,
POLAR1ERRMODEL_IMAGE, POLAR2ERRMODEL_IMAGE, POLARCORRMODEL_IMAGE (more testing is needed and WORLD versions are not yet functional).
Narrowed the tolerance constraint for stopping windowed centering iterations.
Fixed incorrect reading of the DATE-OBS FITS keyword when EPOCH and MJD-OBS are missing.
Pushed version number to 2.11.11.

Fixed WINdowed position error estimates that were underestimated by a factor 2 (thanks to G.Bernstein).
Fixed FLUXERR_WIN triggering issue.
Optimized WIN parameter computations.
Pushed version number to 2.11.8.

Reverted minimization algorithm back to double precision (while keeping single precision for data and parameters in "bounded" space).
Added specific handling of "Jacobian calls" in model-fitting.
Sped up the resampling process in model-fitting.
Tuned up minimization algorithm in model-fitting.
Added shortcuts to the computation of the local PSF model. 
Fixed triggering issues with some model-fitting parameters (thanks to S.Serrano).
Removed CLASS_STAR_MODEL and DISK_PATTERN* measurement parameters.
Added automatic tracking of the PSF FWHM from the local PSF model if SEEING_FWHM is 0 for CLASS_STAR.
Fixed excessive WIN parameter computation time on large ring-shaped objects.
Fixed model-fitting issue with null half-light radii (thanks to S.Desai and B.Armstrong).
Fixed aperture display value error in FITS-LDAC catalogue header.
Removed redundant update_tab() calls in FITS library.
Fixed comment copy issue for slashes within strings in FITS library (thanks to F.Schuller).
Added check of PSF values; SExtractor will now exit in error in the case where all PSF components sum up to 0.
Replaced computation of model second moments and ellipticities with analytical estimates.
Improved the accuracy of peak and average model surface brightness estimates.
Fixed some compiler warnings.
Pushed version number to 2.11.7.

Improved real-time display.
Fixed various issues with XSLT in double image mode.
Pushed version number to 2.11.0.

Improved processing time display.

Fixed error ellipse measurements in PSF-fitting (but works only for PSF_NMAX=1 currently).
Simplified PSF parameter handling (removed PSFDISPLAY_TYPE configuration option).
Simplified triggering of local north axis computation.
Allowed model axis ratios to exceed 1 to facilitate convergence.
Fixed alignment bug for symmetric models.
Restricted maximum allowed range for model coordinates.
Pushed version number to 2.10.0.

Fixed various compilation warnings.

Fixed compilation warnings in pattern.c and lm.h.
Pushed version number to 2.9.9.

Added support for 64 bit binary table elements in FITS library (thanks to J.P. McFarland).

Updated the LevMar library to V2.4.
Pushed version number to 2.9.7.

Fixed X/YMODEL_WORLD issue.
Increased CLEANing margin for model-fitting.

Implemented a more consistent model size and flux scaling scheme for subsampled objects.
Fixed Sersic model generation bug.
Pushed version number to 2.9.6.

Fixed several issues related to image and weight copy prior to fitting.
Fixed bug with symmetric models.
Fixed issue with new FFT planning scheme.
Pushed version number to 2.9.5.

Added new NLOWWEIGHT_ISO and NLOWDWEIGHT_ISO parameters that count the number of bad pixels within the measured isophotal footprint, and within one pixel of the detected isophotal footprint, respectively.
FLAGS_WEIGHT is now working without crashing.
Pushed version number to 2.9.3.

Changed CONCENTRATION_MODEL to SPREAD_MODEL.
Added SPREADERR_MODEL measurement (currently a crude estimate).
Optimized FFT calls.
Set PSF_NMAX to 2 by default.

Removed singular matrix warning.
Added MATRIX_MODELERR measurement parameters.
Added DURATION_ANALYSIS measurement parameter.

Added FLUX_MAX_MODEL, FLUX_EFF_MODEL, FLUX_MEAN_MODEL, MU_MAX_MODEL, MU_EFF_MODEL and MU_MEAN_MODEL parameters (FLUX_MAX_MODEL estimator still somewhat inacurrate).
Added FLUX_MAX_SPHEROID, FLUX_EFF_SPHEROID, FLUX_MEAN_SPHEROID, MU_MAX_SPHEROID, MU_EFF_SPHEROID, MU_MEAN_SPHEROID parameters.
Added FLUX_MAX_DISK, FLUX_EFF_DISK, FLUX_MEAN_DISK, MU_MAX_DISK, MU_EFF_DISK and MU_MEAN_DISK parameters.
Changed the way total model fluxes and model moments are computed.
Pushed version number to 2.9.2.

Changed EPSxMODEL parameters to POLARx_MODEL.
Added AMODEL, BMODEL, THETAMODEL for both _IMAGE and _WORLD coordinates.
Added CXXMODEL CYYMODEL, CXYMODEL for both _IMAGE and _WORLD coordinates.
AddedTHETAMODEL_SKY,THETAMODEL_J2000,THETAMODEL_B1950.
Added ELLIPxMODEL_WORLD and POLARxMODEL_WORLD.
Fixed broken PSF-fitting.
Fixed warnings while generating the configure (thanks to S.Pascual).
Pushed version number to 2.9.1.

Added --enable-best-link configure option.

Changed configure behaviour towards CFLAGS and LDFLAGS: automatic settings are now applied only if the --enable-automatic-flags configure option is set (thanks to S.Pascual).
Version number pushed to 2.9.0.

Fixed random crashes with model fitting (thanks to S.Desai).
Fixed gain problem in PSF fitting.
Pushed version number to 2.8.9.

Re-organized astrometric calls.