ChangeLog

Thread safety in RANSAC improved
release_line_segments takes ptr to LineSegment* and sets the pointer to 0 after delete
Changes of some internal representations and small performance improvements
Fixed error in compute_rectification_transform_from_vp

Experimental support for line postprocessing (parameter refine in find_line_segment_groups)
Fixed threading issues
- Some parallel regions did not use internal number of threads
- By default, omp setting is used
API is enclosed in namespace librectify
release_line_segments for deallocation of memory retuned by find_line_segment_groups

set_num_threads sets internal number of threads and does not interfere with global OpenMP settings.
get_num_threads get number of threads used by the library
fit_vanishing_point function gets the point for a single group
find_closest_group assigns lines to groups
Improved logic for selection of vanishing points and transform computation
RectificationConfig specifies how each direction is rectified with RectificationStrategy (allows for 15 different transforms including pure rotations)
Fixed numerical instability in transform computation.
ImageTransform now contains the actual vanishing points used for transform computation.
Command line arguments in autorectify for selection of the transform
Fixed error in line filtering (which caused that the filter had no effect)
More compact lines, and lower number of lines - improves stability
Point is pure struct with x, y, z members with no c++ interface

Support for negative stride
Buffer format back to float*
Speed improvements in line group estimation and line detection
Parameter tuning to improve results
API changes to simplify usage - see liblgroup.h
Added set_num_threads - multithreading via OpenMP
Image transform computation based on automatic identification of vanishing points
autorectify.cpp application (replaces test.cpp)
Doc update