Clang is now called AppleClang on Mac OS.
[IO] Specify full path in include.
[ML] Specify full path in includes.

Also removed unnecessary includes.
[ML/Tests] Fix warnings in tests.
[GL] Specify full path in includes.
[ML] Make all include paths explicit.
[ML] Include declaration headers first.
Merge pull request #498 from endJunction/FullPathInIncludes

Full path in includes
Merge pull request #499 from endJunction/FixWarningsInMeshLibTests

Fix warnings in MeshLib tests.
[U] Init. impl. of tool for creating BCs from ply.
[FileIO] Impl. BoostXmlGmlInterface::write().

Needed for debugging and utils.
[U] Impl. of writeBCsandGML.
[U] Save each geometry set in own data set.
[U] Merge all geometry sets.
[U] Write BCs and geometry set.
[U] Get only surface nodes.

Sort the merged nodes lexicographically to obtain the surface nodes.
[U] Keep the point names.

Keep the point names deploying PointWithID and name search.
[GL] Using std::lib functions.
[GL] Remove unused var cnt.