Load available source and pdb if available

It would be nice if Reflector could look in known or provided locations for pdb and source code files. If the code being decompiled has source that can be resolved, then this source would be nicer than the decompiled version.

Take this for example - http://blogs.msdn.com/tom/archive/2008/09/01/net-3-5-sp1-source-released.aspx