fix #76a cubes/namespace.py changes
fix bulid issue
[model] New approach to localization WIP

Added localization context; added accessors to model object lists
(dimensions, hierarchies, attributes, …)
[localization] accept string-only localization (no dict)
[localization] fixed testing remnant
[tests] added localization tests
[localization] use '[locale *] in config for consistency
[doc] updated localization documentation
[doc] document namespace; document locale config + some config examples
Merge pull request #206 from byronyi/namespace_test

fix commit 76a563c cubes/namespace.py changes