nice color for comment preview box border
update luckyyang avatar
not public course can be shared with friends, fix #415
delete number label
remove the reduplicate unicorn gem
Merge pull request #420 from lexuszhi1990/remove_reduplicate_gem

remove the reduplicate unicorn gem
refactor code
format only
nicer users#create action code #424
KISS code for user#create #424
wider player
for the player
auto_link desc #423
keep it to the normal font-size
we don't need to choose for now #414
mediaelement_rails -> cdn version of videojs #427
get activities within 30 days
add links and icons
get timestamp
adjust timestamp style