Fix memory leak in merging iterator

Record seeks through many tombstones

Disable quads-based crc32.

Include util/atomic.h in distribution

Clarify things w.r.t license; use git-blame for details

Add stringbuilder to dist

More optimization

Merge branch 'master' of git://github.com/jsgf/HyperLevelDB

Fix race in MemTable::Unref

Support contrarian platforms that prefer MAP_ANON

FreeBSD support.

Make leveldb-dump-all optional

Concurrency improvements.

Merge remote-tracking branch 'upstream/master'

Remove armnod from benchmark LDADD