rebse commit

c24af9a0723d50a32e77dc4beda82d89d37a4818
14af7d3bf5adb29d9bdda51c594fa5a2f1f93552
20f9e1734a86ac8b9885ca3fecfe4ddc1f69f7e4
Revert "rebse commit"

This reverts commit c4d680f482b2923ed2cc5522d3ce4e1b576274a4.
Merge branch 'master' of https://github.com/attakei/mongomock