Added to bkHelper functions to operate on notebook cells from JavaScript
cells. Now you can get the evaluator list, get code cells, set the body,
evaluator and tags og other code cells.
Implemented notebook control rest API and exposed to JVM based languages
protect evaluators that can execute only one request at a time from.
properly handle evaluation error(s)
properly deserialize evaluation results
Cleanup some exceptions on some functions.
Cleanup of debugging messagges.
Rebuild tag map when changing tags from Cell Options UI.
Added new example notebooks (and reworked others).
Added example file for control and reflection API.
Reworked form example.
Now in JavaScript you can access the useful bkHelper function via the
beaker object, like it is done in other languages.
Now you can access the beaker object also in Html-embedded scripts.
Merge remote-tracking branch 'origin/master' into
ildipo/notebookmodelaccess
Added banner.
Some cleanup of cut and paste code
Merge pull request #952 from twosigma/ildipo/notebookmodelaccess

Ildipo/notebookmodelaccess