Remove unused class members.

GMSHInterface: _include_stations_as_constraints
FileIO/Legacy/MeshIO.h: _edge_length[]
Braces around array init lists. Whitespaces.
Correct doxygen parameters.
Extra semicolon.
[ML] Replace deprecated throw() with noexcept.
Merge pull request #441 from endJunction/FixingWarnings

Fixing warnings