[NTG-context] Module for Commutative Diagrams.

Hello! Some days ago, I have written a module for writing "commutative diagrams" using MetaPost. Definition of "commutative diagrams": https://duckduckgo.com/?q=commutative+diagrams The module lives here, now: https://bitbucket.org/andrecaldas/context-commutativediagrams The module still needs a lot of working... but for very, very simple diagrams, it works! At least for me... =o) Comments are very welcome, André Caldas. PS: I have to submit the final version of my doctoral thesis just before the end of the world (20/12/2012). For that reason I have not worked on the simplesteps module... but I'd like to thank all the support given in my last thread.