Started adding pickadate
Finished frontend work for pickadate

Conflicts:
	templates/mypartners/includes/partner_sidebar.html
	templates/mypartners/partner_library.html
	templates/mypartners/prm.html
Using partner tag buttons instead of bootstrap button groups.
re-introduced date-range widget
date widget properly shows and hides.
Removed horizontal scroll bar and fixed some styling on the date pickers.
moved rules to appropriate section.
reordered selectors to fix precedence of styles.
switched to compressed static files and removed unused theme.
start and end date parameters now added to url
ajax properly called for date ranges.
Finished filtering backend and added sorting functionality for activity.
changed activity label and set default to display all.
Wrote a unit test for date filters, and made date filtering more coarse by ignoring times.
Made sure start_date was before end_date in backend. Need to improve UX for the same.
wrote a silly function to covert date objects to a formatted string
Finished date validation for date ranges.
Fixed cursor for date widget again.
bumped versions on static files.
Fixed contactrecord query