Remove file size check in BMP header
Background of a system graphic is not transparent.
Merge pull request #85 from Ghabry/development

Remove BMP size check and remove transparency from system bg
Update Makefile.am
Check for pkg-config, pixman, freetype, png and jpeg, remove sdl_image and sdl_ttf.
Add include path for shinonome.hxx.
Merge pull request #89 from fdelapena/master

Update autotools
8bit PNG: RPG Maker always uses palette index 0 as transparent color
Merge pull request #90 from Ghabry/development

8bit PNG: RPG Maker always uses palette index 0 as transparent color
Enable SDL_mixer in configure.ac
Merge pull request #91 from fdelapena/master

Enable SDL_mixer in configure.ac