NEW: Freetype plugin integrated in omegaOsg
# add the freetype plugin directly to omegaOsg. The freetype plugin is not compiled with
# openscenegraph since it can't easily find the freetype library dependency. Finding freetype
# would require forwarding an environment variable (FREETYPE_DIR) to the external project
# osg, which is not currently supported by cmake.
# see http://www.cmake.org/pipermail/cmake/2011-October/046798.html
# So adding the freetype reader to omegaOsg is the easiest solution for now.