minor combo table cleanup
minor whitespace cleanup
more minor cleanup
misc minor touch-ups
Whoops, type in a previous commit
Merge pull request #808 from linas/amos

assorted minor whitespace changes
rename the atom removal functions
diff tween atom removal and purging in scheme too
Minor bugfix for previous changes.
Merge pull request #810 from linas/del

try to clarify that atom removal does not actually delete them
Bayes Net moralise and triangulate functions now return the links they add
Merge pull request #811 from keyvan-m-sadeghi/master

Bayes Net moralise and triangulate functions now return the links they add