Removing two files created by the FileIO.XmlGmlWriterTest.

GML test

Material group modding

Geometry related bug fixes

Renamed
- from isPntInBV() to isPntInBoundingVolume() and
- from _bv to _bounding_volume
to make the code more readable.

Removing unused objects.

Conflicts:
	Tests/BaseLib/TestQuicksort.cpp

Accelerating piecewise linear interpolation deploying a binary interval search.

Testing of the PointVec class.

This was implemented in gcc-4.7.

This should speed up travis builds.

Travis uses Ubuntu 12.04 which ships with Boost 1.46.0. Required
version was lowered therefore.

This will prevent Travis-builds from failing because of the bad
availability of the original git repo.

Fix some warnings exclusive in visual studio.

Remove warnings in TestPolyline.cpp.