Log Message:
Update to 2.0.19. Set LICENSE to gnu-lgpl-v2.1.

Ver 2.0.19 - Mon Apr 20 22:56:59 PDT 2009

* gcc43 compiler patch for asm code in image filters
  as per http://bugs.gentoo.org/219621 (Peter Alfredsen)
* off-by-one hline patch for 1byte indexed surfaces (Manuel Lausch)
* update acinclude.m4 from SDL-1.2 and moved # serial in file
* applied patch to add pkg-config support for SDL_gfx (Luca Bigliardi)
* changed configure.in INTERFACE_AGE and BINARY_AGE based on Debian
  build feedback (Barry deFreese)
* fixed zoom XY-flip code and made it available for all modes in
  zoom and rotations
* fixed edge issue on interpolated rotozoom modes
* updated TestRotozoom custom test mode, added delay parameter, added
  tests which include flipping, included negative rotation
* update libtool files
* updated Makefile.mingw (Jan Leike)