Add ember support

[Darren-Corbett]

Add support for Ember JS

Aim of this issue is to attempt to add ember support for the nos dapp environment

• add ember application to the structure
• add ember addon support to the structure (nice to have)
• add ember to the cli choices
• add all relevant tests

[DalderupMaurice]

Thanks for creating the issue! We definitely would like to include Ember :) Feel free to pick it up!

[Darren-Corbett]

Started into this still some todo but definitely on the way