Update to 7.8 (#50)

• Fix COSMO results parsing.

• Checked unit and integration tests. Updated reference files to 7.8.1.

• Fixed linting.

• Changed documentation. Changed version.

• Fixed epsilon type in cosmo. Added parsing of solvent and source in cosmo parsing. Added more information for checking changes in dev_script/generate_output_files.py. Added possibility to set solvent and refind in define parameters and in add_cosmo method of Control. Updated reference files.

• Fixed lowercase for solvents. Added tests for cosmo solvents.

• Updated reference files for integration tests.

• Added test for bad solvent name.

• Added test for cosmo predefined solvent.

• Added deps for docs generation. Fixed intersphinx_mapping for new versions of sphinx.

• Updated documentation.

• Fixed missing data file (added init.py in the directory).