* Add support for redis as a datastore
Fixes: #388
* Use HEXISTS instead of HGET when checking for apps and routes
* Get rid of SADD SREM and SMEMBERS
* change redis test port
* Add buffer time for redis docker
* redis test ping loop (#552)
* redis test ping loop
* simplify
* Refactor redis_test.go to adapt to @jmank88 new testing code
* tiny fix
* Redis datastore test fixes (#555)
* redis datastore test fixes - UpdateRoute/UpdateApp
* redis datastore fix InsertRoute
* redis datastore fix GetRoutesByApp
* API endpoint extensions working.
extensions example.
* Added server.NewEnv and some docs for the API extensions example.
extensions example.
example main.go.
* Uncommented special handler stuff.
* Added section in docs for extending API linking to example main.go.
* Commented out special_handler test
* Changed to NewFromEnv
