support for use_strict

variable appears unused but results in

ReferenceError: flowfile is not defined

when node is invoked with --use_strict
REST API for Credentials
Adding RED.nodes.registerCredentials to register the credentials definition server sided.
Adding the property credentials in the template definition client-side.

Connecting the editor to the credential API.
I added a TODO for the validation of Credentials field.
As the other field, the developer should be able to set the credentials as required and also give a validation function.
Unable to click-select link
let nodemon ignore backup file - or it restarts on every deploy.
Tiny EFL tweaks to IRC. Thanks again Belphemur
Merge pull request #222 from Belphemur/node-credentials

Node credentials
New config nodes not picking up defaults
Touch: enable wiring nodes together
Touch: double tap to edit rather than long-touch
Make status display toggleable and add to MQTT nodes
Handle null TouchEvent (FF/Safari)
Touch: unable to scroll after drawing link
Merged with latest from node-RED master
Add status indicators to serial and tcp (client) nodes
Merge pull request #227 from TJKoury/mobile_PR

Add inital pinch-to-zoom implementation
Touch: pinch-to-zoom from touchpoint not origin
Touch: add meta tags for chrome/ios save to homescreen
Add RED._debug
Add sidebar grip and make drag-openable
Touch: long-press initiate lasso