merge nwilliams: Depend on a released, non-snapshot version of Persistit.
merge nwilliams: Depend on a released, non-snapshot version of Persistit.

https://code.launchpad.net/~nwilliams/akiban-server/non-snapshot-persistit/+merge/179452
relateiq/sql-layer,relateiq/sql-layer,wfxiang08/sql-layer-1,jaytaylor/sql-layer,qiuyesuifeng/sql-layer,relateiq/sql-layer,ngaut/sql-layer,ngaut/sql-layer,shunwang/sql-layer-1,shunwang/sql-layer-1,qiuyesuifeng/sql-layer,wfxiang08/sql-layer-1,qiuyesuifeng/sql-layer,jaytaylor/sql-layer,jaytaylor/sql-layer,qiuyesuifeng/sql-layer,shunwang/sql-layer-1,ngaut/sql-layer,shunwang/sql-layer-1,jaytaylor/sql-layer,wfxiang08/sql-layer-1,ngaut/sql-layer,wfxiang08/sql-layer-1,relateiq/sql-layer