Calculate dOmega/dR.
Export dOmegadR, omegaNorm
Minor fix in contact calculation.
Add discrete-option.
Create VTK dir with symlinks.

During discrete analyze VTK-dir is creating,
where symlinks to VTK-files are created.
It is necessary for the ParaView post-processing.
Create VTK_NMU folder mith modified symlink-names.
Add Gamma (local strain) calculation. (Need to be verified).
Add snapshot number to discrete parameter.
Add opportunity to set omega0 explicitly.
Export gamma for each band in text file.
Add an opportunity to load compressed files.

Now the bz2 and gzip compression is supported.
Replace "new" by make_shared