Support adding and changing process templates.

[jhoneill]

As well as Get-VSTeamProcess there should be Add- and Set- commands for it as well.

(PR to follow shortly)

[guzzd]

Any new on this one?

[SebastianSchuetze]

There are PRs for this, but they are old, and the history was / is messed up. The PR shows all (even old) files as new and that is why it is hard to review. Also core code has been changed and not been understood properly.

Let's see how it goes. Implementing full process editing is not trivial.