[TS/CS][75437476] WIP: Use latest activemodel and activesupport gems
[TS/CS][75437476] WIP: Change require to get rid of warning message
[TS/CS][75437476] WIP: Remove require of old library code

Mass assignment security has been replaced in Rails by strong parameters.
I'm not sure how to integrate strong parameters into ripple or if we
even want to since strong parameters operates at the controller level,
which is not a fit for a gem like ripple.