barnacle: load balancer draft
balancer modified API
balancer: add comments
bcTopo strawman
more tweaks and comments
test tweaks
tests for bctopo
more balancer API tweaks
more work on shard_conn
copied tablet_conn.go from tclient.go
sharded_conn coded
Load balanced connection for a shard.
remove vtbarnacle binary
rename bcTopo to BalancerMap
more comments
remove plugin_zktopo
Merge branch 'barnacle'