Add institution to courses table
Merge pull request #392 from VictorNorman/master

Fix many "Lets", "lets", and "Its" to be "Let's", "let's", and "It's".
Clean up the main directory
more file deletions
add seamless attribute to iframes so they flow better
update submodules
update for latest codelens
fix formatting problems
sync to repo with vipuls improvements
upgrade to latest skulpt
work on getting the latest online python tutor goodness integrated
remove print statements
When a user changes their course, add user_sub_chapter_progress entries for them.
Merge branch 'master' of github.com:bnmnetp/runestone
ActiveCode setup needed to be modified after adding the lang attribute to support html and javascript activecode windows.  fixes #393
Merge pull request #394 from VictorNorman/master

Replace "thru" with "through" everywhere.
So it turns out one space can make a big difference!
Get rid of extra prints that publicly display your db url, including the password.
This is an even better way to set the language on the activecode scratch window.
Finally!!  got Vipuls changes integrated into codelens.  code lens will now adapt to screen width, preferring to put frames and objects on the right when window space allows.