Merge pull request #166 from adamarla/master

Mobile app controller changes
Allow icons to be specified in json.badge
Minor changes to uni teacher console ...

1. exam name format changed
2. icons to suggest whether a takehome or an in-class quiz added when showing list of exams
3. For takehomes, download should point to sample exam
Merge branch 'master' of https://github.com/abhinavc/web-application
Minor edits to quizzes/exams and some bug fix(es)
Added badge to exams/list json
Typo corrected
Allow processing of target attribute also within simple_link
Downloads should open in a new tab
Removed redundant examiner menu
PDF downloads in a new tab in two more instances
- "billing" worksheet action
Merge remote-tracking branch 'upstream/master'