Update twitter_backbone and add Browser example

[RobLoach]

@playinglife This doesn't provide a multi-template sandbox, but could be a good place to demonatrate what you're trying to do...

Thoughts?

RE: #711

[playinglife]

Thank you for your answer.

Basically it all started from this:
https://jsfiddle.net/playing_life/g96u3a4j/2/#&togetherjs=9v1FN3d6ap

The code should display only the extension "JPG".
It looks like the REPLACE filter might have a bug.
And from here I just created all sorts of other issues that were related to other stuff.