Updated course index page with feedback link and updated copy.
Fixed documentation var name.
renamed variables documentation error links to documentation_load_error_url
refactored assertValidFeedbackLink into AssertMixin
Made Interactive Tooltip Header Configurable

Consuming code can now configure the header of the interactive tooltip. This has been configured for the engagement content view.
Fix engagement acceptance test by moving back a day.
Merge pull request #145 from edx/engagement-tooltip-update

Made Interactive Tooltip Header Configurable
Merge pull request #147 from edx/dsjen/fix-engagement-acceptance

Fix engagement acceptance test by moving back a day.
Opening Help Links in New Tab/Window
Removed Space after Email Address in Footer
Merge pull request #143 from edx/dsjen/section-error-link

Fixed documentation error variable name.
Merge pull request #141 from edx/dsjen/homepage-sidebar-copy

Updated course index page with feedback link and updated copy.
Updated copy on section error to include student enrollment example.