OCC.Utils _really_ is no place for DataExchange, is showing a poor sense
of structure ( how is data exchange, loading CAD files a utility? )
Added a fast loading STL module. Its 10 - 100* times faster
Updated examples to the new location of the DataExchange package
Modified CMakeList.txt to support new DataExchange path
Added a new example for STL_fast (venus.stl is a huge stl file)
Merge pull request #132 from tpaviot/jf/data_exchange_improvements

Data exchange improvements