Allow for supplying config in code

[ghost]

This seems like an edge case, but it would be nice to have this.
One case would be for example DavyJonesLocker/ember-suave#77.
To enable a single rule in a test.

[kellyselden]

I like it. Can you add something to the readme please to document how to use?

[ghost]

@kellyselden added a bit of README!

[kellyselden]

Thank you!

[kellyselden]

released 1.2.0

[ghost]

$ ember s
version: 1.13.12
Rule "disallowVar" is already registered
AssertionError: Rule "disallowVar" is already registered
    at NodeConfiguration.Configuration.registerRule (/Users/martenschilstra/Projects/Fabriquartz/planboard-addon/node_modules/ember-suave/node_modules/broccoli-jscs/node_modules/jscs/lib/config/configuration.js:864:5)
    at NodeConfiguration.Configuration._loadAdditionalRule (/Users/martenschilstra/Projects/Fabriquartz/planboard-addon/node_modules/ember-suave/node_modules/broccoli-jscs/node_modules/jscs/lib/config/configuration.js:825:10)
    at NodeConfiguration.<anonymous> (/Users/martenschilstra/Projects/Fabriquartz/planboard-addon/node_modules/ember-suave/node_modules/broccoli-jscs/node_modules/jscs/lib/config/node-configuration.js:213:61)
    at Array.forEach (native)
    at NodeConfiguration._loadAdditionalRule (/Users/martenschilstra/Projects/Fabriquartz/planboard-addon/node_modules/ember-suave/node_modules/broccoli-jscs/node_modules/jscs/lib/config/node-configuration.js:211:61)
    at NodeConfiguration.<anonymous> (/Users/martenschilstra/Projects/Fabriquartz/planboard-addon/node_modules/ember-suave/node_modules/broccoli-jscs/node_modules/jscs/lib/config/configuration.js:502:18)
    at Array.forEach (native)
    at NodeConfiguration.Configuration._processConfig (/Users/martenschilstra/Projects/Fabriquartz/planboard-addon/node_modules/ember-suave/node_modules/broccoli-jscs/node_modules/jscs/lib/config/configuration.js:501:33)
    at NodeConfiguration.Configuration._loadPreset (/Users/martenschilstra/Projects/Fabriquartz/planboard-addon/node_modules/ember-suave/node_modules/broccoli-jscs/node_modules/jscs/lib/config/configuration.js:748:10)
    at NodeConfiguration._loadPreset (/Users/martenschilstra/Projects/Fabriquartz/planboard-addon/node_modules/ember-suave/node_modules/broccoli-jscs/node_modules/jscs/lib/config/node-configuration.js:163:41)

@kellyselden I think this broke something. Can you release a new version with this PR reverted?

[kellyselden]

reverted in 1.2.1

[ghost]

@kellyselden I'm sorry, but accidentaly JSCS also released a version today. They took a rule from ember-suave which cause this conflict. Sorry for the inconvienience but you can unrevert the reversion 😅

[kellyselden]

Haha these things happen. I will re-release later today.

[kellyselden]

published 1.2.2