Changes:
- updated handling of SoFiA2 files with minimal input. Please update your Sofia!.
- updated installation_check
- update read me
- tirific and Sofia commands can now be specified through the yaml file
- the number column in the input catalogue is now changed to id to reflect the fact that tiring can be used.
- Read the docs incorporated at https://pyfat-astro.readthedocs.io/en/latest/
- tirshaker is now incorporated as a final stage in order to get errors.
- user can specify fitting boundaries.