used
bootstrap's delete button for comments
can create new tags with a form that lives on lesson new
Merge branch 'master' of github.com:kronosapiens/xp
cleaned up new lesson form
more tweaks to lesson new form
some notices are prettier
avi's edit plus description presence validation
lesson must have at least one tag
validates presence of title, description, tags
validates for unique title
Merge branch 'master' of github.com:kronosapiens/xp