#2182 allow es2015 style params and bindings

[meltuhamy]

This is a first stab at es6-style params. (#2182)

e.g.

<my-component params="thisIsSomethingOnTheVM, somethingElse, asBefore: something"></my-component>

would be equivalent to

<my-component params="thisIsSomethingOnTheVM: thisIsSomethingOnTheVM, somethingElse: somethingElse, asBefore: something"></my-component>```

[mbest]

This would be a breaking change in data-bind bindings. However, this might be okay for components. It would require passing an option when parsing a component's bindings.