Feature/view class list for section

Merging in Roderick's slider implementation from LTI_templates branch.   Add a new view function that returns a class list in the context of a given section, where the rendered view of enrollments only shows those enrollees who are not in the given section.  Use SDK methods to retrieve both lists, while filtering out test students.  Update HTML in section details and add javascript that slides right pane in and out and retrieves the section class list on initial click.  Added new test module for the new view function.
I was basing the logic on the REST API description of what the sortable name would look like, which includes a comma.  The split logic should handle the case of no commas and even multiple commas (which wouldn't make much sense in a multi-part name), and foreign names shouldn't matter assuming the name doesn't have a comma in it.