louismullie/birch — pull request #4 by colinsurprenant (2012-12-07 20:32:36+00:00)
Title: specs and few bug fixes 

basics specs, which resulted in finding a few bugs.

I changed the birch_size semantic to return the size of the subtree, including the root node. Not sure if this is want you wanted and did not research for your usage pattern in Treat.

next step, FFI.