Outdated...

[neilyoung]

...doesn't work anymore w/o getting flooded with deprecation warnings. You should either remove or update it

[shivamsinha15]

As mentioned in #106 ...there is currently no plans to suppport ember 2. However this fork seems to support ember 2:
https://github.com/piceaTech/ember-rapid-forms

[asaf]

Seeking for a maintainer