added first version to find and store neighbours of all elements during mesh initialisation (work in progress)

added some small helper functions (face normal calculation, on-surface-check, etc.), renamed MshElemType::LINE to EDGE, changed a bit of documentation

added recent changes concerning the attachment of time series sensor data to station objects from ogs5 to ogs6, added RapidXml as a small library for reading XML files from console application, added existing xml schema files

- added method to calculate a balanced workload

[new file SimpleTests/MatrixTests/MatVecMultPthreads.cpp]
- test matrix vector multiplication employing pthreads and balanced work

[files MathLib/LinAlg/Sparse/amuxCRS.{cpp,h}]
- implemented matrix vector multiplication employing pthreads that better balances the work

- fixed a typo
- print host info under Unix
- fixed some memory leaks

[file SimpleTests/MatrixTests/MatVecMultNDPermOpenMP.cpp]
- added TCLAP and logog to file
- added Copyright and License notice

This reverts commit 05677165.

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

- added copyright notice
- output machine name running the program

[file SimpleTestsMatrixTests/MatVecMultNDPerm.cpp]
- added copyright notice

- analyse work per core employing OpenMP

From now on OGS has a license! 👏

* master:
  Added license to README and mentioned OGS community.

- added binary name to output
- added number of MVM to output

- program prints build and executing host information