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 '766077c3b528ff65d770a700ad22db4d2ccec4a1' into tdfischer/rocksdb-block-unique_ptr