[BioC] export colored nodes using toDot in ontoTools

[Vincent Carey 525-2265]

> Hi,
>
>
>
> Could anyone tell me how to export a .dot file from ontoTools using toDot?

library(ontoTools)
example(randomGraph)
toDot( g1, "abc.dot")

creates a `dot' format file in abc.dot for the graph g1.

the documentation is not so good for toDot, i will address
this.  thanks for your question