api v2 environments - only looking up by their numerical IDs
environments model - trivial spacing changes
ak-api - working on system groups for activation keys

ak-api - clean up based on pull-request comments

ak-api - updated to use present?

ak-api - more comments addressed
Merge pull request #3651 from komidore64/find-env-yank

for the time being, we're only going to look up katello entities by their IDs
Merge pull request #3675 from thomasmckay/ak-api

ak-api - working on system groups for activation keys