fix memcached local tcp address handling
fix memcached version parsing
fix typo
fix integration test MapReduceIT

1. Add byte array serde in RowWritable for Writable interface
2. Add ByteArrayAdapter for gson to serialize and deserialize byte array
3. Fix iterator in MapReduceIT.CountReduce
4. Fix index off-by-one issue in testDumpTableToHDFS
Merge pull request #194 from yaoshengzhe/fix_MapReduceIT

fix integration test MapReduceIT
Don't internally drop messages in the streamlogger.

The writers have individual backoff, and internal drops can result in
not-insignificant losses during query storms. These are lost simply due
to noise in the Go scheduler, not due to actual backlog.
Merge pull request #196 from plobsing/no-internal-drop

Don't internally drop messages in the streamlogger.
Remove umgmt library. It is unused.
Merge pull request #198 from plobsing/rm-umgmt

Remove umgmt library. It is unused.
Merge pull request #186 from ngaut/master

fix memcached local tcp address handling
Improved the cursor creation api and changed vtgatev2 test to use cursor
api where possible.
Add tracing for GetTabletMap and FindAllTablets.
Adding a bit more logging to track resharding problem.
Remove unused vtgate client.
Remove ZK paths suport names in vtctl commands

1. ZK path is resolved in methods tabletParamToTabletAlias,
   shardParamToKeyspaceShard and keyspaceParamsToKeyspace.
   Therefore, all of them are refactored to not accept ZK path
   and return error if do so.
2. Move vtPathToCell and keyspaceParamToKeyspace to
   vt/vtctl/plugin_zktopo.go since they contains zk
   logic only.
3. Remove resolveWildcards method in vtctl.go
4. Remove most zk stuff in command description
Merge pull request #201 from youtube/replication

Adding a bit more logging to track resharding problem.
Optimize the vtworker clones to pack N inserts together.

That should make inserts N times for efficient. N is set to 10 by default.
Closing the source RPC connection in clone workers.
Merge branch 'master' into trace
Merge branch 'trace'