Feature/oauth

Plase change to:

+ "GetCurrentUser": "get information about the current user",
+ "UpdateCurrentUser": "update information about the current user",
+ "ManageAccessKey": "issue, modify and delete access keys for the current user",
+ "ManageOAuthGrant": "issue, modify and delete OAuth grants for the current user",
+ "ManageUser": "create and modify DeviceHive users (admin)",
+ "ManageDeviceClass": "create, modify and delete device classes (admin)",
+ "ManageNetwork": "create, modify and delete networks (admin)",
+ "ManageOAuthClient": "create, modify and delete OAuth clients (admin)"