WL-98

fix typo and add more security on API

fix some bugs and typos

address PR feedback

be sure to send emails when accounts already exist

PR feedback

fix multiple uploads

pep8 fixes

pep8 fix

pylint fixes

fix url mapping

WL-98
- Complete code coverage
- Update code for error and warning messages.
- improve code as per some suggestions

updated the UI of the auto_enroll feature

fixed the errors

PR feedback

add test

add back file filtering

add some more error handling of input

remove unneeded coffeescript code

pylint fixes

add pep8 space

WL-98
- Updated and added test cases.
- Updated membership coffee file for errors display handling.
- fixed minor text issues.

allow for blank lines and add a test

add blank line (pep8)
Merge pull request #5670 from edx/cdodge/WL-98

WL-98