- biomaj-cli.py: Removed options.release from remove_pending() call as this method remove all pending sessions
- bank.py: Added method 'format_release' to fix problem with release having a dot in its value (e.g.: 6.10)

Updated output for `--search` option

Don't throw if file list from local_file (cache.dir) is empty or None

- It can happen that the list of file on disk it empty or not found at all. In such case, don't throw an exception like
  "'NoneType' object has no attribute 'sort'". This fix force the download again nevertheless.

Fix for 'release.format' configparser problem between py2 and py3, Closes #28 

This should fix the configparser parsing problem that occurs when we read 'release.format' from global.properties #28

Do not use config values, trust database values

- In case we keep old sessions, add the tag 'deleted' to keep trace of time the bank's session has been deleted on disk

Silent log during bank creation for some options