Implement queryz

First cut of queryz. For now, it orders queries by
average latency. We'll need to support more features
on this page.
Merge branch 'monitoring'
Merge branch 'master' of github.com:youtube/vitess
Increase tolerance for memcache timeout
Merge branch 'master' of github.com:youtube/vitess
bsongen stub: Humble beginnings
bsongen: find type an extract data for int64
bsongen: some rudimentary code gen
bsongen: basic types support
bsongen: EncodeInt

Also make some of the types match the encoding.
bsongen: Explicit decode for all simple types
Update README.markdown
Merge branch 'bson'