Implementation of sliding window functionality, so that the full class list becomes available for adding more students
Merge branch 'feature/LTI_Templates' into feature/view_class_list_for_section
Initial check-in of section class list view so changes in develop can be merged back in.  Added JS slider logic to section_details template and created new partial template that call to section_class_list method renders and returns.  The section_class_list returns a list of users that are in the course list, but are not already in the given section.  Start of a test file for this new view function.
Merge branch 'develop' into feature/view_class_list_for_section

Conflicts:
	add_people/templates/add_people/section_details.html
	add_people/tests.py
	add_people/urls.py
	add_people/views.py
Updated tests for view function section_class_list.
Merge branch 'develop' into feature/view_class_list_for_section
Add test to ensure enrollments are sorted by sortable name.
New filter for getting just the last name from sortable_name field of enrollment.  Incorporate filter into shared name partial.  Add tests for filter.  Reincorporate some changes from prior merge that were lost and minor tweak to not have to do initial showing/hiding of empty section list div in JS.
Merge branch 'develop' into feature/view_class_list_for_section
Merge pull request #78 from Harvard-University-iCommons/feature/view_class_list_for_section

Feature/view class list for section