BREAKING - Changed to Postgres

• CouchDB was too slow, and finnicky. We've now moved to PostgreSQL. See README for info on using Postgres.
• BGP Prefixes, ASNs, and Communities are now stored in PostgreSQL using SQLAlchemy + Flask-Migrate
• New run.sh file makes it easier to run the various management commands, as well as for upgrading looking glass painlessly
• Systemd service files have been updated to use the new run.sh to avoid long virtualenv paths, and LGUSER has been changed to lg to match the README user.
• Better PyDoc comments across the application, especially inside of peersapp.import_prefixes
• Various other small performance + reliability improvements, including better use of Redis for caching.