*** RELEASE 2.0_beta4, 26 OCTOBER 2009 ***

CORE
 - Fix config file parser to compile on boost 1.32.
 - Fix scattered tile size options by centralizing into vw::Settings.
 - Fix discrepancy in cache_size settings about whether the value is MB or B.
 - Fix (unlikely) threading issue in ThreadPool's notify().

MATH
 - Add a "set_ones" method for matrices, much like matlab's.
 - Add a min()/max() method for Vector & Matrix.
 - Add function to solve for nullspace of a Matrix (with LAPACK).
 - Fix to perform correct homography fitting in RANSAC.

IMAGE
 - Add create_mask support for scalar pixel ranges.
 - Fix convolution error on multi-plane images.
 - Add blob_index for identifying connected blobs.
 - Fix to allow Pixel math operations to work properly on PixelMask'd images.
 - Add intersect and union for PixelMask.
 - Fix several of the Statistics.h functions.
 - Fix bug where raster queue in block write would get way ahead of writing
   queue, resulting in huge memory use.

FILEIO
 - Add support for PBM/PGM/PPM-format files (All but P4 is currently supported).
 - Add helper code for writing KML.
 - Fix singular iterator in OpenEXR code.
 - Add KAKADU support if GDAL supports it.

CAMERA
 - Fix compilation on very old versions of Boost.
 - Large refactor of bundle adjustment code to encapsulate various adjustment
   strategies.
 - Fix to make sure calibration code runs the requested number if iterations.
 - Fix nasty problem causing infinite-loop mis-compilations.
 - Change api for control network reading/writing.

CARTOGRAPHY
 - Fix bad bug where UTM zones far from poles could cause transformation
   failures.
 - Fix so GDAL access is thread-safe.
 - Fix bug around poles in ToastTransform.

GEOMETRY
 - Added TranslationFunctor.

STEREO
 - Removed PixelDisparity<>. Replacement is PixelMask<Vector2f>. See comments in
   DisparityMap.h for help in porting.
 - Fixed row/col swap bug that affected linescan images.
 - Fixes so correlators are more resilient with images larger than memory.
 - Fix problem with EM SubPixel correlator injecting noise.
 - Re-numbered stereo correlators (see SubPixel.h).
 - Added experimental, rather slow but accurate, gamma-distribution-based EM
   SubPixel correlator.

TOOLS
 - colormap: Add support for standard Moon/Mars ranges.
 - slopemap: New tool for generating slope maps.
 - image2qtree: Fix to allow negative UTM override.
 - image2qtree: Fix bad bug where UTM zones far from poles could cause
   transformation failures.
 - Many: Move default tile size option into vw::Settings.
 - contourgen: new tool for generating SVG contour maps.
 - ipfind & ipmatch: Make more resilient with large images.

BUILD
 - configure will now error if you specifically ask for a module or tool and
   that tool is missing dependencies.
 - Minor enhancements (ccache, profile, fat binaries, rpath).
 - Disable strict aliasing by default, to work around (old, fixed) compiler
   bugs.
 - Began switching to Google Test framework. Core and Math are converted.
 - Make Boost detection more robust.
 - Fix build on systems where /bin/sh is dash.
 - Support autoconf-2.64.