Merge pull request #9 from cloudsoft/feature/bump-versions

bump brooklyn version and brooklyn-networking version
Removes use of `long` durations and cluster.growByOne.

Fixes build for recent API changes in core Brooklyn.
Merge pull request #11 from cloudsoft/fix

Removes use of `long` durations and cluster.growByOne.
add support to create sshable image

fix Dockerfile for Centos
fix DockerHostSshDriver.createSshableImage effector
fix some errors due to latest Brooklyn changes
work for DockerHostLiveTest
removing MachineLocation interface from DockerHostLocation