* Improve these methods to find members inside nested types as well.
* Simplify their implementation somewhat.
* Make the filter method optional to allow enumerating everything.
* Rename these methods to Enumerate* to better express what they do.
* Make them extension methods on AssemblyDefinition to make them more
discoverable and easier to use.
Improve perf in cecil-tests by caching loaded assemblies, and thus only
loading them once. The gain isn't all that much - it saves about 3s of ~2m on
my machine, so ~1.5% faster - but it'll be more and more important as we write
more tests. Also the code becomes slightly simpler too.
Improve performance in Cecil.Tests.GenericPInvokesTest by creating fewer
strings.
This saves about 1m07s seconds on my machine, from 2m10s to 1m03s, so ~52%
faster.
Rolf Bjarne Kvinge
Steve Hawley