vtgate v3: implement vunhash
Grammar/typo correction
Merge pull request #177 from flimzy/doc

Grammar/typo correction
Explicit conversion of exception args to tuple.
Add rows returned counter in VTGate.
Merge pull request #178 from youtube/vtclient

Explicit conversion of exception args to tuple.
Merge pull request #179 from youtube/liguo

Add rows returned counter in VTGate.
Add ThrottledError exception
Fix the queryserive test
Merge pull request #180 from youtube/liguo

Fix the queryserive test
tabletserver: use dba conn for maintenance tasks

Schema loading and query killing have now been switched to
use dba connections.
pools: clarify diff between capacity and maxCap
Merge pull request #181 from youtube/suguwork

Suguwork
tabletserver: improved row counting

Row count wasn't getting reported correctly in a few places.
All fixed up now. I've also added tests to make sure they don't
break in the future.
Merge pull request #184 from youtube/suguwork

tabletserver: improved row counting
Merge pull request #183 from youtube/vtgate

vtgate v3: implement vunhash
v3 proto: vindex interfaces
v3 proto: new schema build, with positive tests
v3 proto: select plans
v3 proto: dml plans