fixed issue 1434, ImmediateModeRenderer20 didn't handle texture coordinates correctly
fixed issue 1426, spritebatch should check size limit, we use shorts for indexing...
fixed issue 1368, lwjgl can't handle null for data supplied via glBufferData...
Merge branch 'master' of https://github.com/libgdx/libgdx
Added resourcefiles to build. Fixed hack with hardcoded font files for gdx-core. Put assets files into gdx-tools.jar.
Merge remote-tracking branch 'origin/master'