Added color markup.
Scroll bg is optional.

closes #1856
Merge branch 'origin/master'
fix arrow bug
Merge pull request #1857 from lordjone/arrow

fix createArrow bug, part 2
Added glyph count.
Merge pull request #1855 from davebaol/color

Added color markup.
getAngleRad -> angleRad to be consistent with other methods (eg rotate/rotateRad).
Added a separated Colors class.
Fixes #1859
Updated CHANGES
Merge pull request #1862 from davebaol/color2

Added a separated Colors class.
Updated CHANGES
Merge pull request #1863 from davebaol/CHANGES

Updated CHANGES
linker flags to windows, latest mingw requires libwinpthread
more linker flags, for freetype
fixed linker flags for bullet
Merge pull request #11 from libgdx/master

merge with libgdx/libgdx