Sass client support + promise based processors

Also re-implement client side stylus (ref #902).

Also optimised the render process, so if the source hasn't changed, then the compile process is ignored.
Fixed resetting of processor

And set the panel names to the language
Working forked process - BUGGY

Stylus updated, and forking works, but we have no control to kill the process after a timeout (which is the aim). Currently sending the kill signal blows up the main node process - which is the current state of code (with commented out code that has the child actually succeed).
Working terminate and fork
remove redundant line
Push live reload scripts to scripts.app
SCSS going via server. Now has full SCSS support
Splitting out the processors and supporting zmq

Note that zmq is used in production along side Pennyworth.
Working zmq processors
Swap zmq for axon
Pass processors.run an object
return when calling next
Accept error messages (and show in console log for the moment)
Added sass and stuff
Merge branch 'feature/scss' of git://github.com/jsbin/jsbin into feature/scss

* 'feature/scss' of git://github.com/jsbin/jsbin:
  Added sass and stuff
  Accept error messages (and show in console log for the moment)
Always use process with compass
Merge branch 'feature/scss' of https://github.com/jsbin/jsbin into feature/scss
Renamed processes for compatibility
Standalone css output
Added sass standalone connection to pennyworth