Squashed 'src/rocksdb/' changes from 224932d..3d32529

3d32529 Replace naked calls to operator new and delete (Fixes #222)

git-subtree-dir: src/rocksdb
git-subtree-split: 3d3252920af52ac820c8ec0b6915b4e645911811
Merge commit 'e228bd8db4ed14a99f61a7e3699002143ba1ecca' into tdfischer/rocksdb-block-unique_ptr