Ref #65: Documented pc.recovery.
Ref #67: Documented wsrep_evs_repl_latency status.
refs #30 - kill load and wait sync before exit in seesaw/stopcont tests to
           make sure that all of the nodes have processed all generated
           transactions at test exit
Merge branch '2.x' into 3.x
Merge galera-3.x upto db55c359f3f4274afca4a2b4a899bac2e3f7c200