@manager update, db_uri and muic_dir environment variables
Album addition and Track altered also
shorten names, more concise
backref'd album in Track, manage updated

I've left notes in-line about problems which I'll list here
- creates a new album entry in the db for each track in the album
- search is not functioning (not sure why this is)

the Album entries seem to work as expected and we can add the date,
label and such later.
forgot one
Merge github.com:graue/potsfyi

Conflicts:
	manage.py
Fix typo in createdb