Ref #81 Updates to Admin Guide
Ref #95 Documented wsrep_sync_wait
Ref #67 Updates to wsrep_evs_repl_latency.
Ref #95 Updated wsrep_sync_wait.
refs #89 - added release codename to version string
refs #100 Remember highest seen view seqno to make sure that
          install view id always increases when install message
          is regenerated. Unit test.
Merge galera-3.x upto revno 15a33ef3aba66ede98f7c7bd5cc0f9bcf7a42885
Merge galera-3.x upto revno 15a33ef3aba66ede98f7c7bd5cc0f9bcf7a42885