anchor.diff:  Before playing, the gamer needs an identity... Login provides such an identity.
   
   
  -## How Login works [/v1/gamer/login]
  +## Gamer login [/v1/gamer/login]
   
   The login route is used to authenticate a gamer, and get basic profile information about him.
   
  
positive.code:             "message" : "Invalid App Credentials"
          }
  
  ## Logout [/v1/gamer/logout]
  
  Log a gamer out
  
  
negative.code: |---        |---            |
  |x-apikey   |Your API key   |
  |x-apisecret|Your API secret|
  |Authorization| Basic `gamer_id:gamer_secret` *(base64 encoded)*|
  
  Both `gamer_id` and `gamer_secret` are returned by `/v1/gamer/login`.
  
  