Feature/18 oauth service session api#2

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adamdullenty wants to merge 4 commits intomasterfrom

feature/18-oauth-service-session-api

Commits on Jul 4, 2017

Auto token exchange now working without refresh
garytaylor
committed

Commits on Aug 22, 2017

Swap /application_token endpoint back to /token
Adam Dullenty
committed

Commits on Aug 23, 2017

Revert
Adam Dullenty
committed
Remove unneeded client_secret from API key exchange
Adam Dullenty
committed