calendar JavaScript needs refactoring to test

[Deryck Hodge]

lib/lp/app/javascript/calendar.js is impossible to test in YUI test. It has the one public function add_calendar_widgets and a couple private ones that are used inside that function. The module basically takes a node and adds a date picker calendar to it. The module needs to be rewritten into smaller functions that are easily testable if we want to get this tested under YUI test.

I'll gladly mentor anyone who wants to do some JavaScript coding on Launchpad to fix this. It would be a nice way into Launchpad, YUI, or YUI test for someone with those interests.