Merge pull request #19 from twitter/develop

Merge from twitter/storehaus
Read through store - do not query backing store when no cache miss
Merge pull request #246 from rubanm/readthrough_keysfix

Read through store - do not query backing store when no cache miss
Minified kill 2.9.3
Merge pull request #249 from twitter/removeScala2.9.3-2

Minified kill 2.9.3
Merge branch 'sh_develop' into bump_finagle_save_txns