PEP8 fixes and documentation strings added to all source files
Check if the new victim being added is not already in the committed hashes table before adding it to the submissions table
Update lookup tools to use the new constructor variable in the Victim DB object API
Turn all variable names that are constants to uppercase for consistency
Add note for new sources plugins to the sources library
Add documentation detailing the lookup tools and architecture
Add documentation string detailing get_cache to victim_db_manager.py