Towards TNL 1.0

Thinks to do for versioning of TNL and to get to TNL 1.0:

• create version 0.9 ASAP.
• create folder TNL/Experimental and UnitTests/Experimental which will hold all code which is not matured enough.
  • Move Images to TNL/Experimental
  • Move Algorithms/Sorting to TNL/Experimental
  • Move everything in Arithmetics except Complex to TNL/Experimental
  • Move Functions to TNL/Experimental
• How about Atomic.h? Might be avoided.
• move FileName.h and FileName.hpp to tnl-legacy if possible or move it to TNL/Experimental if we need it somewhere.
• Move CFD to TNL/Experimental.
• Move Solver.h, SolverConfig.h, SolverInitiator.h and related files in Solvers to tnl-legacy.
• Move Tools/tnl-benchmark-to-html.py to tnl-legacy.
• Move Tools/tnl-diff.[h,cpp] to tnl-legacy.