* GDL2Palette/ResourceManager.m
          include missing header
        * GDL2Palette/Palette.[h|m]
          use NSString instead of NSConstantString



git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/gdl2/trunk@36297 72102866-910b-0410-8b05-ffd578937521