Fix tests: wait on correct resource-urls after delete.
Fixed the mongo db structure doc.
Made mongo a configurable backend.
Added first bits of postgres code.
Generalize db methods.
Created pg test setup.
Added utils module.
Fixed pg sorting and added a bunch of tests.
Fixed linting issue.
Use seperate config files for environments.
Update require path.
...again.
Update README.md
Fixed mongo config access and trailing ws.
Fixed config path.
Added tests for updateSprints
Added missing find functions.
Merge branch 'postgres' of https://github.com/mkulke/tisch into postgres

Conflicts:
	postgres.js
	test/test.sql
	test/unit/postgres.coffee