Merge branch 'issue_25'

Pharo is green, GemStone is red[1], the tests need to rewritten so we're not dead.

[1] https://travis-ci.org/dalehenrich/tode/builds/7852396
improve db commands api for programmaticly setting breakpoints
add RoassalSupport ... add foos description
checkpoint ... adding edges
hack to get roassal view displaying correctly (cannot use tODE windows for roassal at the moment)
add TDRoassalListElementBuilder in support of roassal ... proof of concept for roassal is complete
MCFileTreeTodeTool work