New version of angular-formly

[egucciar]

Please leave your wish-list for new version of angular formly. I have assigned a few issues to myself already and intend to implement. I do not plan to introduce breaking changes.

Already lined up:

• Bug fix for 1.2 angular - validateOnModelChange functionality
• Adding new "context" object which will allow for more functionality to be built with formly (this is WIP - need to get a feel for the limitations of the "form" object before pulling this trigger)

I am probably going to take my time on the release. So please recommend any improvements and I may consider them.