Added Associated Type support in Get properties

[stephen-hawley]

Added Associated Types support in get properties.

This is only a smoke test - the code doesn't get executed (yet).

For the most part, the work was similar to methods:

• flag when a protocol has associated types
• use the correct method in the static receiver
• use the generic renamer to get the associated type names in the generics

One other things that came up - the way that I handle the wrapper for associated types is that I write a synthetic ClassDeclaration and copy all the protocol methods and properties into it. That done, it can get passed to MethodWrapping to get turned into a set of functions that we can pinvoke into.
The problem I was having was that every member of the class points to the parent, but when I was looking for the a matching wrapper, I wasn't finding it, and sure enough, the wrapper class didn't have any properties in it.
The problem was that when I called MakeUnrooted on the synthetic class, its members lost their parentage. I put in a hack patch instead of fixing MakeUnrooted because I'm worried about code that might depend on that behavior. Issue for that is here.

[rolfbjarne]

Nitpick: if one part of the if statement has curly braces, the other should have too (or neither).

[stephen-hawley]

Good to know. Likely this test is going to go away in about 4 PRs so I'm not going to fix it now.