* Implement POST /oauth/apps endpoint for APIv4
* Implement GET /oauth/apps endpoint for APIv4
* Implement GET /oauth/apps/{app_id} and /oauth/apps/{app_id}/info endpoints for APIv4
* Refactor API version independent oauth endpoints
* Implement DELETE /oauth/apps/{app_id} endpoint for APIv4
* Implement /oauth/apps/{app_id}/regen_secret endpoint for APIv4
* Implement GET /user/{user_id}/oauth/apps/authorized endpoint for APIv4
* Implement POST /oauth/deauthorize endpoint
* Refactor and move session logic into app package
* Refactor email functions into the app package
* Refactor password update into app package
* Migrate user functions to app package
* Move team functions into app package
* Migrate channel functions into app package
* Pass SiteURL through to app functions
* Update based on feedback
