Add some custom filters to help build the enrollment view that breaks up enrollees by letter ranges based on last name.  Create a new template html snippet that builds the list pagination, with options to display a way to delete or add each enrollee.  Added tests for new filters.
Merge branch 'develop' into feature/display_enrollees_in_name_buckets

Conflicts:
	add_people/templatetags/aptags.py
	add_people/tests.py
Fix lower range test.
Merge pull request #72 from Harvard-University-iCommons/feature/display_enrollees_in_name_buckets

Add some custom filters to help build the enrollment view that breaks up...
Merge branch 'develop' into feature/displaytype_huid_xid

Conflicts:
	add_people/templates/add_people/section_details.html
	add_people/templatetags/aptags.py

Add new test cases in test_aptags.py
Update _enrollments_list_by_name.html with identifier HUID or XID