Fixed date parsing from period start/end pickers;
Added actual type support to import_form
Fixed baseUrl
Refactored dry argument to a flag on self set in save method
Added Spin.js
Added import success message
Refactored app and created UploadController
Refactored import_form - extracted code into new ImportFormController;
Implemented DatepickerInput;
Added Spin adapter to indicate upload;
Implemented import_message;
Implemented Toggled mixin
Merge branch 'develop' of https://github.com/prjts/open-budget into develop