Merge pull request #64 from nikicat/master

Refactoring: deprecate TemplateFile
Bump version: 11.0.0 → 11.1.0
exit with non-zero code on error
deprecated --namespace, added --override instead
added --vcr option to record docker interactions
make "container status" return non-zero when containers differ
Bump version: 11.1.0 → 11.2.0
Image: use null namespace by default
print detailed exception info on error
Bump version: 11.2.0 → 11.2.1
pin requirements
fixed tests
pin requests version (>=2.4)
unpinned vcrpy
pinned urllib3 version (>=1.9.1)
"container status" return non-zero if some of containers differs
Container: allow to customize entrypoint
task exec: allow to bypass stdin to container
fixed container creation: use internal port instead of external
allow to not provide ship for Task