Bump version up to 0.7

Change-Id: I03bb3c6f0697fe2aea0d65f9da76aafe18be5cc6
Reviewed-on: http://review.couchbase.org/32810
Tested-by: Mark Nunberg <mnunberg@haskalah.org>
Reviewed-by: Matt Ingenthron <matt@couchbase.com>