Committers: new cassandra-2.1 branch created

[Sylvain Lebresne <sy...@datastax.com>]

We're about to start the vote on 2.1-beta1 and I've created the
cassandra-2.1 branch. Please make sure to commit/merge to cassandra-2.1
before trunk starting now.

Note: for now, I haven't created a cassandra-2.1.0 branch but probably will
in the future when we start having issues that we want in 2.1.1 but are not
comfortable for 2.1.0, but I'll send another email when that happens.

--
Sylvain