Marathon-lb 1.1.1

This is a maintenance release, which contains fixes for new issues introduced in v1.1.0, as well as existing issues.

in ~/dev/marathon-lb $ git shortlog v1.1.0..HEAD | cat
Brenden Matthews (12):
      Build script should fail on error.
      Merge pull request #58 from occ/patch-1
      Merge pull request #56 from otto-de/fix-python-2-support
      Add more useful error message about $PORTS
      Merge pull request #50 from davidr/multiple_vhosts
      Merge pull request #61 from mesosphere/ports-env-var-message
      Fix sysctl command.
      Couple of minor bug fixes.
      Merge pull request #67 from fpgeek/support_healthcheck_port
      Merge pull request #66 from Lnmix/master
      Reduce delay between iptables setting and reload.
      Add benchmark test app json.

Dave (2):
      Support the port parameter of healthcheck
      Fix unit test fail

David Ressman (6):
      Add support for multiple vhosts for a single service port
      Trim long comment line
      Change hostname delimiter to a comma from a semicolon
      Update README.md for multiple hostnames in single vhost label
      Add documentation
      Update multiple vhost test

Felix Bechstein (1):
      fix python 2 support

Lukas Loesche (1):
      on failure cycle through hosts instead of hard coded first one

Lukas Lösche (1):
      Merge pull request #63 from mesosphere/lloesche/sse-cycle-hosts

Max Verzier (1):
      Preserve HAPROXY_SSL_CERT new line characters

Onur Can Cakmak (1):
      Fix unbound variable