new upstream release 1.2.0

updated regex in watch file, we want to be as precise as possible so
escape dots and use \d when looking for numbers.

updated dependencies: extras is needed. statsd is optional, Zuul does
not requires it.

Building with git buildpackage I get:

dpkg-checkbuilddeps: Unmet build dependencies: python-extras python-statsd

Intends to packages:

python-extras http://bugs.debian.org/695833
python-statsd http://bugs.debian.org/703613 (by me)