*** RELEASE 2.1.0, 1 SEPTEMBER 2010 ***
CORE
 - Add hit/miss/evict data collection for Cache
 - Change CacheLine::value() to also take shared_ptrs
 - Fix Log::add to use the given RuleSet (bug reported by Rodrigo Benenson)
 - Fix some multithread bugs in logging code
MATH
 - Add abs overloads for Matrix and Vector
 - Add CDF Accumulator support for arbitrary quantile count and stddev approx
 - Fix a possible infinite loop in ConjugateGradient
 - Fix lapack use on osx 64-bit
 - Fix VectorTranspose assignment to MatrixRow
 - Remove incomplete Fundamental Matrix solver in favor of new one in Camera
IMAGE
 - Add a config setting (write_pool) for thread pool size for io-blocked threads
 - Add an ImageResource for OpenCV's cv::Mat
 - Add non-in-place pixel accessors
 - Add PerPixelIndexView as an abstraction for pure-functional views
 - Add remap_pixel_value which... remaps pixel values!
 - Fix assignment to select_(col|row)
 - Fix is_opaque to return true iff every channel is completely opaque
 - Fix many bugs related to PixelMask math operations
 - Replace BlobIndex class with blob_index function
FILEIO
 - Fix DiskImageResourceJPEG's error-handling to avoid setjmp
 - Fix DiskImageResourcePNG's  error-handling to avoid setjmp
 - Fix DiskImageResourcePNG to write data on write() rather than destructor
 - Fix minor windows incompatibility (unlink)
 - Fix DiskImageResourcePNG distructor to not throw
 - Fix DiskImageResourceGDAL to use vw::Log for message-handling
 - Fix nonexistent and invalid file-handling for all DiskImageResources
BUNDLE ADJUSTMENT
 - Refactor quite a bit
CAMERA
 - Add accessor for PinholeModel's camera matrix
 - Add Adjustable Tsai lens distortion model
 - Add Brown-Conrady lens distortion model
 - Add Fundamental Matrix 8p solver
 - Add Fundamental Matrix ML solver
 - Add new EXIF tag names to spec, and make it an enum
 - Change IO to use protocol buffers instead of a custom binary format
 - Refactor PinholeModel and CameraModel for more model types
CARTOGRAPHY
 - Fix polar singularity issues by drawing an X across the pole
 - Fix read_georeference to return a bool about success
INTERESTPOINT
 - Improve memory use with iterators instead of copies
 - Refactor Descriptor
TOOLS
 - ba_test: fix brokeness with boost filesystem 1.36
 - grassfirealpha: many improvements
 - image2qtree: support arbitrary spherical datums
 - image2qtree: allow user-override of georeference info
 - ipalign: improve defaults, allow saving of intermediates
 - ipfind: improve defaults
MISC
 - Use boost::noncopyable instead of the private copy constructor idiom
 - Fix gccisms for clang++
 - Many more tests
 - Remove TestInstantiate stuff (cool experiment, but too fragile)
 - Switch from libtool's -version-info to -release numbering. Binary
   compatibility is Too Hard.