added an alreadyClicked parameter to the ajax methods for deleting sections and people. The parameter will be set to true on first click and stored in the nodes data attribute. The value will be set to false upon ajax success or error.
Merge branch 'develop' into feature/eric_section_delete_confirmation
Revert change to have local requirements include master branch of auth-lti instead of develop - can't reproduce bug that Eric saw related to using develop.  Supply delete section url when generating links, and pull that href when intercepting click via javascript instead of trying to construct url in js method.  Introduce a modal confirmation window/step so user must now confirm that they want to remove the section.  Remove the li element containing the deleted section instead of just hiding it.
Merge branch 'develop' into feature/eric_section_delete_confirmation
Show and hide error message tab based on error/success for both removing section and removing users from sections.  Show a modal dialog confirmation when removing a user from a section.  Clicking button to confirm removal will make ajax call only the first time it's clicked via the 'once' method binding.
Update language of section removal button to say "Delete" instead of "Save Changes"
Merge pull request #86 from Harvard-University-iCommons/feature/eric_section_delete_confirmation

fixed double clicking ajax request error for sections and people