actions: added "build" command
fix: JsonFile should not require "name" argument
fix: do not output stacktrace on devicemapper bug
fixed debian package
actions: do not require requests_cache
actions.build: added --push flag
actions.list-containers: allow filtering by ship name
actions.localexec: fixed container removal on error
pep8 style fixes
Merge pull request #24 from nikicat/master

added "build" command, debian package fixed, various command fixes