Update to display if the user id is HUID or XID
views.py: new function (remove_from_section) to remove a user from a section, using canvas_sdk
section_details.html:
 -- added ids to elements we need to find/manipulate via js
 -- added javascript to:
    call remove_from_section via ajax
    generate success and error messages based on ajax success/failure
    decrement count when user removed from section
    hide name range in header while deleting users
    display 'no users' message when count of users reaches 0
tests.py:
    added tests for remove_from_section
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
Remove dupe test case
Added test case for checking non-string as value
Merge pull request #73 from Harvard-University-iCommons/feature/displaytype_huid_xid

Update to display if the user id is HUID or XID
Update display of HUID/XID
Merge pull request #75 from Harvard-University-iCommons/feature/displaytype_huid_xid

Update display of HUID/XID
code changes from merge from develop
fix to views -- change to use response.json rather than using response.content
incorporated suggestions from code review
Merge pull request #77 from Harvard-University-iCommons/feature/Sections_CS

Feature/sections cs
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