updated the cursors, avatar positioning, pulse
Adjust peerconnection instantiation a little.  Fixes nothing
Fix #184, reset share link input field if it gets changed
Merge branch 'master' of github.com:mozilla/towtruck
updated the "Welcome" screen
Do some of #179 - add a modal that is displayed just the first time TowTruck is started.
tried to fix cursors, looks different on browsers
merge
Merge branch 'master' of github.com:mozilla/towtruck
Squashed 'app/http/public/towtruck/libs/Guider-JS/' content from commit bad6a35

git-subtree-dir: app/http/public/towtruck/libs/Guider-JS
git-subtree-split: bad6a35cec94c31772e56a646dfb70078d4bcd0a
Merge commit 'bbc84a80624bb99f3071e8f443c9ad183f52e04e' as 'app/http/public/towtruck/libs/Guider-JS'
Fix shareId problem when activating TowTruck normally
updated the How To Install section #216
Setup Guiders-JS to support #121 and #122.  Add a help button to start the walkthrough.  In element-finder.js, ignore the guider element.  Rename hideWindow to ui.hideWindow (i.e., make public).
Merge branch 'master' of github.com:mozilla/towtruck
updated the site - How it Works
Adding universal-analytics package for tracking to google via the Measurement Protocol.
Tracking requests of the towtruck.js. This is pretty naive right now, but is also purely anonymous.
Using the env var in our layout for our google analytics account id.
Adding tracking code to the towtruck controller so that every time /towtruck.js is requested, we record the referrer.