[ALOY-695] Create controller-specific version of Alloy.UI.create() that doesn't require controller name

Currently UI components can be created with dynamic styling by calling Alloy.UI.create(). The signature of this function takes the following 3 parameters (in order): * A string containing the name of the current controller * A string containing the API name of the component to create * An options object containing style information and properties to add to the created component To make things easier, there should be a controller-specific version that doesn't require the first parameter. SO instead of doing this:

var proxy = Alloy.UI.create(
    'index',
    'Label',
    { id: 'someId', text: 'some text' }
);

you would just be able to do this in the index controller:

var proxy = $.UI.create(
    'Label',
    { id: 'someId', text: 'some text' }
);