Employee Profile fixes

- Only admin can update profile
- Consistent header
- My Profile menu-item
- Employment date for list page
Modifications

- Validate holiday modifer
- Only show holiday_requests for admin and supervisors
- Use redmine datepickers
Holiday Modifier validations.
Added cancel to forms.
Fix tests.
Readme and year selection for module.
Merge pull request #10 from digitalnatives/gdotdesign/modifications

Modifications