MB-100: Fix README's Markdown

The README contained expressions wrapped in angle brackets, those
weren't correctly rendered by Markdown. They are no wrapped in
code expressions.

Change-Id: I50970c82492a1e1d8e4a0931f22c45f7ef90ac58
Reviewed-on: http://review.couchbase.org/25134
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Filipe David Borba Manana <fdmanana@gmail.com>