Update CMakeLists.txt

Enable c++11 support for this branch.

CMakeLists.txt

@@ -20,6 +20,7 @@ set(ASSIMP_PACKAGE_VERSION "0" CACHE STRING "the package-specific version used f
 
 # Needed for openddl_parser config, no use of c++11 at this moment
 add_definitions( -DOPENDDL_NO_USE_CPP11 )
+set_property( GLOBAL PROPERTY CXX_STANDARD 11 )
 
 # Get the current working branch
 execute_process(