manage_depended_services parameter

[alexjfisher]

Not sure this is a great name. Did you mean dependent?
Also, maybe this is better split into manage_redis, manage_yarn etc.
(Since you're only doing an include nginx perhaps you don't strictly need a manage_nginx. Then again, is apache a viable alternative that some users might want to use?)

[bastelfreak]

added the license in #4

[ghoneycutt]

In my refactor (#15) this parameter still exists though I add fine tuning to individually opt out of managing each dependent bit like yarn, redis, nginx, etc.