Merge pull request #16 from jaymzh/knife

[TT] Fix knife.rb generation
README files for GD and TT, plus a GD bugfix
Merge pull request #17 from jaymzh/docs

README files for GD and TT, plus a GD bugfix
Remove plugin-loading code.
Merge pull request #18 from jaymzh/host

Remove plugin-loading code.
Add an untester. Fix docs.
Merge pull request #19 from jaymzh/untest

Add an untester. Fix docs.
Add missing requires
Merge pull request #20 from jaymzh/dep

Add missing requires