Create placeholder for non-required references.  Closes #53
Select subkey by function
0.4.0
Update README.md
Porting upstream's bc69271
Build
Merge commit 'b6e8d769d075a08be6ba4f0fc3eead23f1d7d9f0' resolved by using Mine

Conflicts:
	dist/forms-angular.js
	dist/forms-angular.min.js
	js/controllers/base.js
	server/data_form.js