Merge pull request #8 from Kulgar/stable

Modified beta.openbadges issuer to backpack.openbadges
twd badges
fix module true-up
more flexibility when fetching old config settings
updated badge images
remember course-level permissions during oauth dance
less confusing badge-in-progress text
remember name and email through oauth dance
mozilla link is domain-sensitive
fix links on badge stats pages
get rid of tick on 100% module completion progress bar
show earner email by mozilla link
fatter 'no-progress' min on bar
better spacing on badge earn list
add google analytics tracking spot

also requires adding org_check to all views, since
tracking id is stored on the org model
add basic indices to models
credit cutoff can't be zero, causes NaN
reword public option for badges
better support for reuse code across orgs
reuse code index