Autoclasswrapper

- Remove wrap method for results
- Update list of authorized characters in column names

- Move function utilities to tools.py
- Change defaut filename to 'autoclass'

- Fix error decorator for Sphinx doc generation
- Use 'class' (instead of 'cluster') for consistency
- Move get_autoclass_version() out of Run() class
- Create file marker upon autoclass run success/failure

- update missing dependencies in setup.cfg
- improve PEP 8 and PEP 257 compliance
- add documentation (Sphinx)

- print Exception content for check_data_type()
- output class probability for every gene/protein
- simplify the calculation of cluster stats
- class/cluster numbering starts at 1 (0-based in autoclass output)
- add dendrogram of classes
- add reproducible run option (test only)
- add tests for Input() class
- add tests for Output() class
- add tests for Run() class

- update write_cluster_stats() methods with mean/std column
- output data+clusters in clust_data.tsv