Added a simple README for the doc folder
Updated the native folder

I did several things

1) Moved all of the adventure engine specific code into System
2) Renamed those moved folder to be more meaningful
3) added exported variables so that referencing clips.h and other files
   can be done with <> instead of relative paths with ""
4) Added exported variables so that we know where the root of the build
   directory is.

5) Updated all of the code to compile correctly
Deleted the emacs editor code