Add jsbin to SnappySnippet

I've (@remy) have been wanting to be able to grab a blob of HTML and all it's related CSS for years now, and so pleased that someone has built this (thank you @kdzwinel!). But realised that jsbin's posting API wasn't documented (and actually had a bug when wanting to post *and* show specific panels), so I've patched the plugin to add jsbin support. Hope you like!

Cheers,

– Remy
jsbin requires poosted values as encodeURIComponent
jsbin => JS Bin

Interchangable really, but probably people are more familiar with JS Bin. That said...the twitter handle is @js_bin...sigh...
Merge pull request #5 from jsbin-org/feature/jsbin-support

JS Bin support