add VTK2TIN, TIN2VTK
add TINInterface in FileIO
use TINInterface in OGSIOVer4
add convertSurfaceToMesh()
use Surface object as intermediate data in the conversion
use Git SHA as the version number
add OGS_USE_MPI cmake option and USE_MPI macro
add Logog Cout which allows one computing core (rank 0) to print the log
[FileIO] Test for reading TINs.
[FileIO] Corrected readTIN() and made it more robust.
[FileIO] readTIN(): check if tri isn't degenerated.
Merge remote-tracking branch 'tom/add-TIN-tools' into add-TIN-tools
add padLeft() to StringTools
print MPI rank to logog output
extend LogogCustomCout to support level dependent output
[ML] A MSVC friendly alternative to MathLib::pow().
Replace constexpr with const.
[T] Added some other tests for TINInterface.
[FileIO] Made readTIN() more strict.

- Checking for empty lines.
- If line (except empty lines) doesn't start with id the TIN file is not correct anymore.
Merge pull request #34 from TomFischer/add-TIN-tools

Add tin tools