COW b-trees

This repository implements the COW friendly b-trees, as described in the paper: Ohad Rodeh B-trees, Shadows, and Clones ACM Transactions on Storage 2008

The code contains a lot of scaffolding, but the main directory is src/oc/bpt. BPT is short for "B Plus Tree". The license is BSD, which should allow incorporating the code into other open source projects.