Added dataflow module DataflowNest with nested functions---it's a thing of beauty.
-rw-r--r-- 197 .gitignore
-rw-r--r-- 2043 PROBLEMS
-rw-r--r-- 782 README
drwxr-xr-x - paper
drwxr-xr-x - private
drwxr-xr-x - prototypes
drwxr-xr-x - src
drwxr-xr-x - testing