- fixed a bug with OBJReader that prevented the material color to be loaded correctly

- added a corresponding unittest

Thanks for the patch by Karthik Nathan

closes #1473

git-svn-id: http://www.openmesh.org/svnrepo/OpenMesh/trunk@823 fdac6126-5c0c-442c-9429-916003d36597

src/Unittests/TestFiles/square_material.mtl

@@ -0,0 +1,4 @@
+newmtl Colored
+Ka 0.500 0.500 0.500
+Kd 0.500 0.500 0.500
+Ks 0.500 0.500 0.500