docs/api.rst: adds example response to login endpoint
api/auth.go: fixing typo on error message
Merge branch 'master' of github.com:globocom/tsuru into db
db/storage: starting to migrate base storage functions to external project
Merge branch 'master' into db
db: moving storage logic to db/storage pkg

Also finishing migration to use it
using new method to connect on database everywhere
db/storage.go: exporting tsrStorage.

Also adding methods that other packages need, like Close and Collection
Merge branch 'master' of github.com:globocom/tsuru into db
Merge branch 'master' of github.com:globocom/tsuru into db

Conflicts:
	app/app.go
	provision/docker/scheduler_test.go
db: fixed some tests.
db: fixed api tests.
db: renamed TsrStorage to Storage.
renamed NewStorage to Conn.
db: fixed race.
update license headers.
added new race.
Merge branch 'master' of github.com:globocom/tsuru into db