Reduce get_default_tags_for_project complexity and minor model formatting
Add full test coverage for roundwared.db.get_recordings() to reproduce #123
Convert string list to int list to fix #123
Actually fix #123 by using get() instead of getattr()
Merge pull request #128 from eosrei/123/filter_tags

Convert string list to int list and add full tests for get_recordings()
various documentation updates, mainly installation and API related