Merge into a single project

[pharring]

I originally split Editor Guidelines into three projects:

1. The MEF component
2. The Package and
3. The VSIX.

This was mostly as an exercise to demonstrate how we could separate the editor component from the package and join the IServiceProfiler world to the MEF world. That's no longer necessary, nor is it convenient.

• Combine the three projects into one.
• Remove the rendezvous code.