Templatize the inbox view and use the same pattern for in-window view
switching as is now used with the conversation/message detail views.
This means doing more with markup and less jquery manipulation of
individual subelements of the inbox view.
Define a Whisper.View base class that automatically parses and renders
templates and attributes defined by the subclass. This saves us a good
number of lines of code as well as some marginal memory overhead, since
we are no longer saving per-instance copies of template strings.
The first message sent to a new contact was throwing 'Unknown Group'.
This was because we didn't wait for the initial save to sync the `type`
attribute to indexedDB. Instead, don't trigger the conversation to open
until it has finished saving.
This collection is just an in-memory indexer used for typeaheads. For
display, the matching models are added to a separate collection. Thus,
the order of the elements in the typeahead collection does not matter.
It feels a little weird when you can't see the matching member. Would
consider putting this back in if we display the member list in the
contact list item view.
Getting up and running with IndexedDB was pretty easy, thanks to
backbone. The tricky part was making reads and writes asynchronous.
In that process I did some refactoring on Whisper.Threads, which
has been renamed Conversations for consistency with the view names.
This change also adds the unlimitedStorage permission.
