ticket:6 Implement Calendar widget for 'Date of birth' field
ticket:6 Create tests for 'edit' page view submissions via ajax
ticket:6 Update 'edit' page view to handle AJAX requests
ticket:6 Update Selenium tests to test form submission via AJAX
ticket:6 User can submit edit form via AJAX
ticket:6 Disable form during submission, indicate loading state
Merge branch 't6_widget'