Include Reach confirmation messages in canon

[ksheedlo]

WHAT: Cloud Intelligence has some use cases where we'd like to use the following pattern for letting users know when they have accomplished some action.

AFAICT this pattern exists outside of canon, but is a generally recognized pattern that we'd like to standardize.

HOW: This could be done in a couple of different ways depending on how framework-ready the Reach implementation is. I'll have to do a small investigation to figure out.

1. Crib the code from Reach, then forward port to canon-bootstrap.
2. Implement in canon-bootstrap first, possibly with a prototype in Intelligence. Then backport to canon if desired (probably, since we want to share more with Reach).