Merge pull request #87 from DiamondLovesYou/master

Fixed epgsql dependance tuple.
Added boss_db:migrate support in MongoDB, using fake transactions.
Merge pull request #88 from entronic/master

boss_db:migrate support in MongoDB
Use non-insane behavior for replsets
Merge branch 'master' of github.com:evanmiller/boss_db
Update mongo to non-stupid version
Support db_write_host and friends
Pop the actual connection stuff into its own callback, so that we can
retry it if the database goes away or we can't connect, initially.
Fetch AWS credentials from environment if db_username and db_password are not set in boss.config
pgsql test model name fixed.
Exponential backoff strategy with retries for database connection.
Merge pull request #91 from cstar/master

Fetch AWS credentials from environment if db_username and db_password are not set in boss.config
Keep track of timer and cancel it on termination.
One more timer reference to handle.
Merge pull request #92 from davidw/connect_db_backoff

Exponential backoff + reconnect
Fix compilation of typed record fields
Merge branch 'master' of github.com:evanmiller/boss_db
Added convenience find_first(Type) and find_last(Type) functions.
Fix macro breakage in previous commit
Restore previous cut_at_location implementation

You need column numbers to know where to cut!