Added skeleton budgets app.
Code style.
Renamed views to remove repeated module/app name.
DB configuration independent of install directory; using relative path.
Admin config fixed after model rework.
Basic Budget creation implemented.
No need to include 'next' field in forms other than login form.
This was carried along when copy/pasting forms I guess.
Placeholder classes for other PeriodControllers.
Merge branch 'feature/create_budget' into develop