Minor improvements to video markup
Merge pull request #47 from pmuir/rvm

Add rvm files to isolate env
Merge pull request #48 from pmuir/video_markup

Minor improvements to video markup
Only set the image to the thumb if not already set
Merge pull request #50 from pmuir/video_default_img

Only set the image to the thumb if not already set
Start adding development reps to gemspec
DEVELOPER-876 Add demos