1.1.1:

 In kdtree.c/kdtree.h:

   * (12/14/2006) [API] Removed kd_root structure and kd_root_node(); 

        now uses only kd_node

   * (12/14/2006) Fixed kdtree_release() to get rid of big memory leak

   * (12/14/2006) [API] Changed kdtree_release() prototype

   * (12/14/2006) Added bbf_data structure to avoid potential data loss 

        in bbf search

   * (01/19/2007) Fixed memory leak in kdtree_build()

   * (03/30/2007) Fixed pq insertion bug in explore_to_leaf()

 In sift.c:

   * (12/14/2006) Fixed significant bug in interp_hist_entry()

   * (12/14/2006) Fixed memory leak stemming from scale_space_extrema()

   * (01/19/2007) Fixed memory leak in calc_feature_oris()

   * (09/10/2007) Removed unused variables in convert_to_gray32() and

	scale_space_extrema()

   * (11/08/2007) Changed RGB2GRAY flag to BGR2GRAY in convert_to_gray32()

	to conform to OpenCV image storage conventions

 In xform.c

   * (09/10/2007) Fixed potential overflow error in calc_min_inliers()

 In imgfeatures.c/imgfeatures.h

   * (09/13/2007) [API] Renamed 'class' field of struct feature to

	'category' for compliance with C++ language (class is a keyword)

