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_SKELETON_SUPPORT)
-endif()
-
 if (EXISTS ${CMAKE_SOURCE_DIR}/ObjectTypes/PolyhedralMesh)
     add_definitions (-DENABLE_OPENVOLUMEMESH_SUPPORT)
     add_definitions (-DENABLE_OPENVOLUMEMESH_POLYHEDRAL_SUPPORT)
@@ -30,4 +26,5 @@ endif()
 openflipper_plugin (INSTALLDATA Icons  
                     DIRS OpenMesh OpenVolumeMesh Widgets 
                     DEPS OpenMesh OpenVolumeMesh
-                    OPT_TYPES SKELETON)
+                    OPT_TYPES SKELETON BSPLINECURVE
+                    TYPES POLYMESH TRIANGLEMESH)