Adds function image_copy_ref to image module for getting a new reference
to an image. It can be used instead of image_make_subimage when the
sizes of the original and the subimage are same.
- Everyone who has contributed code to the project has been asked to license
their contributions under LPGL and they have agreed.
- COPYING file changed to say LGPLv2.1 instead of GPLv2.
- GPL changed to LGPL in the header of every single file that a header and
header added to the few that were missing one.
- Also.. Happy new year!
-Removed unnecessary <math.h> headers
-Updated AVX/asm optimizations to match the new file hierarchy
-Makefile only compiles .asm files if KVAZAAR_DISABLE_YASM is not set to 1 and TARGET_CPU_ARCH is x86