NEW FEATURES
+ o The new function is.monophyletic tests the monophyly of a group.
+
o There is now a c() method for lists of class "DNAbin".
o yule.cov() now fits the null model, and its help page has been
corrected with respect to this change.
+ o drop.tip() has a new option 'rooted' to force (or not) a tree
+ to be treated as (un)rooted.
+
BUG FIXES
the fix. With other improvements, this function is now about 6
times faster.
+ o write.tree() failed with objects of class "multiPhylo".
+
+ o drop.tip(, subtree = TRUE) sometimes shuffled tip labels.
+
OTHER CHANGES
o rcoal() is now faster.
+
+DEPRECATED & DEFUNCT
+
o klastorin() has been removed.