Add bloom filters
Fix formatting
Change filter implementation
Refactor filter impl
Fix doc
Refactor filter impl
Add doc
New CLA form
Fix formatting
Support for column families in TTL DB

Summary:
This will enable people using TTL DB to do so with multiple column families. They can also specify different TTLs for each one.

TODO: Implement CreateColumnFamily() in TTL world.

Test Plan: Added a very simple sanity test.

Reviewers: dhruba, haobo, ljin, sdong, yhchiang

Reviewed By: haobo

CC: leveldb, alberts

Differential Revision: https://reviews.facebook.net/D17859
Merge branch 'master' of https://github.com/facebook/rocksdb
Merge pull request #125 from ankgup87/master

[Java] Add bloom filter JNI bindings