Bump and build v2.0.0-pre.1
Underscored region's ensureEl
Rename Region#open to Region#setHtml
Removes calls to prototype.constructor

Resolves #1338
Merge pull request #1354 from jmeas/bye-prototype-constructor

Bye prototype constructor
Renames append methods to attach
Switch to Mocha & Speed up Grunt
thisify fixtures
thisify sinon
Normalize Whitespace & Move everything into beforeEach blocks
thisify tests