Scope: Release of v0.7.2

A release continuing the refactor and tidy of servlet implementation.
The servlet implementation is considerably changed in this release, although
the public API is relatively untouched. However, the mechanics of servlet request
handling are much more straightforward now, and should allow alternative
implementations to be fitted on top more easily. However, all handling of
session state has been removed although the session is now available in the
ServletContext during a request.

* Overhaul of org.scopemvc.view.servlet.xml.*
* Overhaul of org.scopemvc.controller.servlet.*
* Addition of unit tests for ...controller.servlet.* and ...view.servlet.xml.*
* Various bug fixes.