Generalize the Container Error class names.

Remove the word Zip from the names so that they make a bit more sense when being
used in the context of subclasses.
Bump version number.
Polish example scripts.

Better usage info is provided and all scripts are now executable.
Merge branch 'next'

* next:
  Polish example scripts.
  Generalize the Container Error class names.
Update the changes file for release.