Counters: remove need for "slot" by incrementing base pointer.
Counters: enable faster counters with --enable-rdtscp.

We were missing an AC_DEFINE() to ensure the setting in config.h.
Net: remove inline from printf helper.

This wont always be inlined anyway due to size, so no real need to
worry about it. We can simplify things with -Bsymbolic in library
situations anyway.
bump libbson
Containers: add BitArray structure.
Containers: don't require an intermediate structure for BitVector.
File: add Path_Rename() and Path_Unlink().
Storage: implement naive I/O

This just jumps to the worker thread pool to perform direct I/O with
no buffering. Pretty much worst case performance, but puts some plumbing
in place to play around with ideas.
Storage: use Page from Mutable.
Storage: add DBFile_Destroy().
tools: stub out congo-dump-freelist
Storage: use vector of page pointers instead of contiguous pages.
Storage: play around with api ideas for nsfile.