Don't emit description in processed_courses view

The description is not changed by the view, and therefore redundant.
Use include_docs in a view to access description.
Change xml4_document to render using full row

Instead of pulling out doc or value from the view row, use the entire
row to render xml fragments. This allows templates to work with both a
view row’s document and value at the same time. And, it’s easier to
understand because a template row now lines up exactly with a view row.
Update templates for template, offering, section

Update the XML4 templates for D2L templates, offerings, and sections to
match the change to the processed_courses view and the template context.
Update template for D2L users

Update the XML4 templates for D2L users to match the change to the
processed_people view and the template context.
Update template for D2L enrollments

Update the XML4 templates for D2L enrollments to match the change to
the processed_memberships view and the template context.
Emit instructors in processed_courses view

Process member documents and emit course instructors.
Ignore instructors in template/offering/section

Add a predicate to xml4_template, xml4_offering, and xml4_section to
filter out instructors. The processed_courses view emits instructors in
addition to courses.
Combine courses and instructors in ares_courses

Modify the ares_courses list function to combine course and instructor
rows. Update the ares_course template to match changes in the template
context.
Change ares_feed to render using full row

Similar to xml4_document, use the entire view row to render Ares data,
instead of specifically pulling out value or doc.
Extend ares_feed to accept a filter predicate

Match xml4_document to accept an anonymous function as a filter on view
rows.
Filter for active users only in ares_courseusers

Only active course users should be sent to Ares.
Update Ares courseuser template

Match changes to view and template context.
Update Ares user template

Match changes to view and template context.