First pass at primecache in go.

There is a feature test that allows us to run it and try it.
It doesn't work right now, mysqlbinlog doesn't return anything.
Merge branch 'master' into replication
Merge branch 'master' into replication
Working version of primecache.
Add SSL support in VTGate
More robust version, test is automated now.

(test uses sudo and takes a long time, so it's ot possible
to run all the time).
Removing a duplicate test.
Minor cosmetic changes, using a single channel.
Merge branch 'master' into replication
Update to avoid massive test change
Merge branch 'master' of github.com:youtube/vitess
New function in keyspace to return shard_name for keyspace_id.
Minor fix to the test name.
Fix timeout is being ignored
Merge branch 'master' of github.com:youtube/vitess
Fix vtclient init parameter
Merge branch 'bson'