WIP: complete refactoring from unfiltered to play

General remark, this first integration is made in a feature-first manner, hence
code might not have the final structure and some hacks could have been chosen
to reduce time-to-feature

Current status:
* majority of the primary actions are implemented, but eveything is in Application
* facing a problem during instantiation of the Spark shell
Still WIP

Spark okay, but needs dist
Observable okay
Sql has problems with several rx
add html files...
bug fix and new supports
* fix scopedScript to take the right container
* fix the input number to accept string input as well (html...)
* error logging for observables in Sql
* support save notebook
* fix websocket communication
move coffee and adapt their load
and again
fix examples
version and org...
fix snbs and nb serializer
Merge pull request #50 from andypetrella/play

Play