The template arguments are matrix type and vector type. For new
matrix types it is necessary to specialize the template. This is
done for DenseMatrix as matrix type and double* as vector type.

added function rotatePoints() that is applying a 3x3 rotation matrix to the points given within the vector pnts
refactored rotatePointToXY()
added function rotatePointsToXZ()

This reverts commit 05677165.

Conflicts:
	FileIO/XmlIO/XmlGspInterface.cpp
	README.md

renamed namespace GEOLIB to GeoLib in order to be consistent with other OGS-libraries and directory names

- renamed method to access coordinates from getData() to getCoords()

- added test programm for solving a linear system with CG-method
- time measurement is at the moment OS dependent!
- added Base folder
- added GeoLib folder
- added files in MathLib folder - restructured MathLib folder