Merge pull request #19 from chrisdfe/master

Did some style stuff
Changed tasks to single-screen ajax-driven interface.  Mostly works, but it is ugly and there is some sort of JS bug that occurs after selecting one of the tasks from the list - the form switches out correctly, but then the Add Sensor and Add Action links fail, and submission results in being redirected to the JSON reply instead of pulling it in via AJAX like normal.
Saving progress to switch computers
Removed old JS file that was causing trouble, updated seeds file
Switched to regular JS, since coffeescript was being such a pain
Fixed JS bugs and switche task screen to two-column layout
More cleanup
Merge branch 'master' of github.com:cbarcroft/Sentrino