forestdb.paths: Add words for messing around with forestdb paths.
forestdb.lib: Adding code to do compaction.
forestdb.lib: Add byseq mapper and unit test some deletion.
forestdb.lib: Remove concept of handle pair.
forestdb.utils: Move utility words for tests into own vocab.
forestdb.lib: Fix resource usage and cleanup. Reenable some snapshot tests but they expose bugs in forestdb, I think.