re-add submodule init/update
Merge pull request #148 from cockroachdb/andybons/bootstrap

re-add submodule init/update
don’t pull in bootstrap
Don't install go vet in bootstrap if it's already there.

Fixes a problem reported on the mailing list.
Merge pull request #149 from bdarnell/bootstrap

Don't install go vet in bootstrap if it's already there.
add txn uncertainty test & fix a bug
util.rand concurrency fix