Separated all OpenMesh related types, removed core dependency on OM Object types

CMakeLists.txt

 include (plugin)
 
-if (EXISTS ${CMAKE_SOURCE_DIR}/ObjectTypes/BSplineCurve)
-  add_definitions (-DENABLE_BSPLINECURVE_SUPPORT)
-endif ()
-
-if (EXISTS ${CMAKE_SOURCE_DIR}/ObjectTypes/BSplineSurface)
-  add_definitions (-DENABLE_BSPLINESURFACE_SUPPORT)
-endif ()
-
-openflipper_plugin ()
+openflipper_plugin (TYPES POLYMESH TRIANGLEMESH
+                    OPT_TYPES BSPLINECURVE BSPLINESURFACE)