Modifies AfterEditEvent.spec.coffee to use mocha and chai

Moves Americano.NodeSplitDetectors.spec.coffee to NodeSplitDetectors.spec.coffee
Modifies AfterEditEvent.spec.coffee to use mocha and chai

Moves Americano.NodeSplitDetectors.spec.coffee to NodeSplitDetectors.spec.coffee
Fixes americano specs runner and updates NodeSplitDetectors.spec to use mocha and chai
Applying new tests
Removing bad merge
Adds new mocha specs

Updates specs-migration-to-master

[#3](https://trello.com/card/editor-extraction-migrate-specs-to-mocha-and-chai/513f949e18ee71640e00073f/3)
Merge pull request #16 from Banno/specs-migration

Specs migration [#3](https://trello.com/card/editor-extraction-migrate-specs-to-mocha-and-chai/513f949e18ee71640e00073f/3)