Replace all instances of ":" with an underscore for compatibility with Windows.
Duplicate checking implemented.
New post notification in forum instead of new topics
Change static reminder text for subscription
Merge remote-tracking branch 'origin/forum-lessonbin' into forum-lessonbin
migration for digest subscription option
model update for digest option
skeleton code for digest mailing job
Fix wrong post attribution
Fix potential unauthorised access to virtual folders.
Forum daily digest delivery completed
Decrease transparency on Lesson Plan sticky headers.
Fix generating the nav bar for students' lesson plan.
Do not hardcode the title of the Materials directory.
add digest option in controller
Don't have separate classes for our materials tooltips
Only mail new post notification to non-digest subscribers
Show date/time format hint on .datetimepicker-past input elements.
Simplify retrieval of datetimepicker format string.
Allow users to add new entries directly to a milestone.