Add MVCoconut to extra libs

[gene-pavlovsky]

Hi!

Would it be possible to add the excellent Coconut libraries from @back2dos ?
It's a microframework consisting of
Observable Data Layer, based on tink_state: https://github.com/MVCoconut/coconut.data
Reactive View: https://github.com/MVCoconut/coconut.ui

To pull in the whole thing, just add this to haxelib:
https://github.com/MVCoconut/coconut.vdom

Would be much appreciated (even if you only add coconut.data).
Thanks!