the cat shat on the mat
works with dia

 - string hard coded
chmod + shebang
restrict dia import scope + pass api data object, instead of brutishly acquiring it
works as import function.
ROM object class
ROMObject: hash + eq
ROM csv export: print hash-o-hashes

TODO
  support ER elements as well as Flowchart
    ER weak entities look like compound objects
  detect arrow types
  convert hash-o-hashes to proper incidence matrix and save as csv
ROMObject: int conversion
convert dict-based matrix to list-based one
writes matrix as real csv
syntax
exports incidence matrix
comment
fix incidence list matrix dimension calculation
teach diarom about PolyLines in diagrams
select unconnected arrow during render