Added tests for all /tutorials paths (POST and GET)

- app_spec:
  - follow redirects, check for :redirect?
  - check regex match of found results, :not_found? for invalid requests
- app: no longer issue 201 status for redirect
- environments: moved to config/ and loads sqlite3 configurations from database.yml
- Created database.yml
Removed indentation in database.yml
app_spec: add before clause for /tutorials specs; add descriptions
Merge branch 'feature/db-test' into develop