Rewrote FeatureFilter.leaf as FeatureFilter.OnlyChildren(FeatureFilter.none).  This is semantically
equivalent, but avoids the IsLeaf special cases (at least one of which was buggy).  If nobody screams
I'll remove IsLeaf completely in a few days.
Rewrote FeatureFilter.leaf as FeatureFilter.OnlyChildren(FeatureFilter.none).  This is semantically
equivalent, but avoids the IsLeaf special cases (at least one of which was buggy).  If nobody screams
I'll remove IsLeaf completely in a few days.


git-svn-id: ed25c26de1c5325e8eb0deed0b990ab8af8a4def@3345 7c6358e6-4a41-0410-a743-a5b2a554c398

sbliven/biojava,sbliven/biojava,sbliven/biojava