ttroots
=======

-Allows underscores in root chunks that are written to disk.
-All root chunks are printed out in the LaTeX document as 
 upright verbatim names.


notangleall
===========

-creates all required directories for the code chunks
-tangles all root chunks (as noweb -t)
-makes all scripts mared executable. The marking is done
 as follows:
 %unx chmod +x chunk_name
 <<chunk_name>>=
    ...
 @

 Can also be used for other UNIX commands that should be
 executed after the tangling.