Moorka UI redesign

[fomkin]

It will be new module and package Felix. So that are we need

• Dynamic typed template engine (no predefined tags)
• No Scala.js dependencies
• No global objects

It will fix #8 #9

That else?

• [x] RxElement (switch?)
• [x] FutureElement
• [x] Tests for PropertyDirective

[fomkin]

I'v decide to move "React-like virtual-dom with diff applying" to backlog.

[fomkin]

Issue became EPIC!