Bump rails to ~> 4.0.5
cancel and void icons should use fa-times
Use fa-check, not fa-ok
Refer to selected shipping rates directly

This means that rates can be available on shipments, but not shipping methods

Useful for extensions like spree_easypost which only set rates and don't have shipping methods
Bump to 2.2.2
Bump to 2.2.3.beta