* Add RequestID to the RequestScope
* Expose RequestID to auth & request loggers
* Use the RequestID in templated HTML pages
* Allow customizing the RequestID header
* Document new Request ID support
* Add more cases to scope/requestID tests
* Split Get vs Generate RequestID funtionality
* Add {{.RequestID}} to the request logger tests
* Move RequestID management to RequestScope
* Use HTML escape instead of sanitization for Request ID rendering