FSI: tone down logging in embedded session

- This is what was slowing down TypeScan.scan() it prints a deep inspection of each type to stdout, which is pretty intense for system.type
- There is still some slowdown here because I can't turn off all the logging using the configuration object
Runner: delete TestPlugin/TestRunner

These aren't needed, the test cases and Nancy sample should be adequate samples
Add new plugin configuration syntax and GenProject plugin

- The GenProject plugin produces a project.fsx file from an FsProj file
- While not strictly necessary, this saves some otherwise tedious steps when adding files or references, since those changes would previously need to be re-done manually in Project.fsx
- This required some refactoring of how plugins are specified, because GenProject requires some additional configuration options; the refactoring rippled through to the watcher and plugin interface code, but things are more flexible now
- There are some spurious white spaces changes here; seems like re-indenting with visual studio isn't such a great idea, since it and Xamarin have conflicting ideas about FSharp style
Merge branch 'master' of github.com:jmquigs/FSIRunner