adding an upgrade page to the manual

There are a lot of changes between 0.6 and 0.7 and it
only seems fair that there is some more detailed guidance
as to the changes you will required to make.

This request is incomplete and requires the following at min todo list:

- [ ] list all any additional artifact naming changes (i.e. view modules artifact id's etc)
- [ ] detail more of the metric changes i.e. I suspect the metric names will have changed
- [ ] review the list of changed package names and relocations
- [ ] test instructions on some non trivial projects
- [ ] review placement and heading, is the manual the right place for this document?

Note if anybody wishes to help with this request, I haven't got any issues adding you as a collaborators
to my fork if it'll help get 0.7 out of the door.