allowing number of CPUs to be customized via DOCKER_CPUS
updates sed to not remove '-g' option
Updates README for setting docker0 CIDR
Adds DOCKER0_CIDR config directive to dvm.conf
Updates Vagrantfile to set docker0 CIDR if given

 * bridge_utils needed to be installed
 * docker0 interface needed to be shutdown
 * docker0 interface needed to be deleted
 * args passed to docker needed to be updated
fixes escaping in sed command
Merge branch 'fix/unable-to-stop-delete-containers' into feature/set-docker0-cidr
Use boot2docker-vagrant-box 0.8.0
Merge pull request #20 from rubbish/cpus

allowing number of CPUs to be customized via DOCKER_CPUS
Merge pull request #21 from yacn/fix/unable-to-stop-delete-containers

Fixes inability to stop or delete containers if DOCKER_ARGS used
Merge branch 'feature/set-docker0-cidr' of https://github.com/yacn/dvm into yacn-feature/set-docker0-cidr

Conflicts:
	Vagrantfile
Merge pull request #29 from jfoy/boot2docker-0.8.0

Use boot2docker-vagrant-box 0.8.0