Only show sent_at for outgoing messages, matching Android.
The received_at timestamp reflects the time a message was saved locally.
It is necessary on both incoming and outgoing messages for sorting
purposes, but can be confusing in the context of an outgoing message
detail view, since users don't think about themselves "receiving" their
own messages, and may even interpret this as the time that a message was
received by their conversation partner's device.
// FREEBIE
Typically, a view can specify its templateName and then use the default
render method on Whisper.View, except in some special cases like message
view or message detail where other operations are performed during
render.
// FREEBIE
* Don't open message detail views from message detail views
* When message errors change, re-render the error state, but
not the message markup and contents.
* Fix renderErrors bug not removing the error class correctly.
// FREEBIE
The resend button should disappear once you've clicked it. This was not
happening because the message detail view held a cached copy of the old
message errors. Fix by re-reading the errors when we re-render.
// FREEBIE
Change how message errors are rendered. Errors associated with a number
will be shown under that number in the detail view rather than piling up
in the message bubble.
// FREEBIE
Fixes#264
Implement the equivalent of java's String.hashCode on the conversation model.
Change avatar template and attributes. Use css classes for colors.
Clicking on a key conflict message opens the message detail view,
which displays the contact(s) in this conversation. If the message
contains a key conflict with any of these contacts, a button is
displayed which attempts to resolve that conflict and any other
conflicts in the conversation that are related to that contact.
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.
