added youtube gem
Merge branch 'feature-youtube' into dm-working
Merge branch 'dm-working' into feature-youtube
styled related videos div
Merge branch 'feature-youtube' into dm-working
stash
added ajax method to reload related videos
Merge branch 'feature-youtube' into dm-working
Added AJAX methods and styling to related videos section
Added lesson images and image displays
Merge branch 'feature-images' into dm-working
Merge branch 'dm-working'