action: local{exec,start,status,restart} now accepts "shipname" argument
entities: added docstring for TextFile
utils: added getcallingmodule function
entities: "memory" property removed from Ship (implemented in dominator.yandex)
entities: fixed chained SourceImage building
entities: workaround Docker bug "Driver devicemapper failed to remove root filesystem"
entities: workaround Docker bug "Cannot find child"
utils.compare_container: use Image.getid() instead just Image.id
entities: Container.volumes becomes a dict
entities: pep8 fixes
utils: fixed compare_files (no "name" Volume attr)
SourceImage: WORKDIR support
use requests cache to speed up loading
version bump to 2.0 due to api incompatibilities
actions: fixed --clear-cache handling