util/translation.py tool for notebook po and pot files management
argparse subcommands implemented
LocalData for notebook specific info and stringdocs added
some PEP8 spacing
fuzzy warnings fixed
added support for named languages in settings
Corrections in string docs
lazy messages added
typo in docstring and pep8 stuff
extract nN_ dummy translations
Merge pull request #238 from migeruhito/po_management

Po and pot management utility
Themes infrastructure
themes rendering and Test theme
themes running except worksheets
Themes on worksheets - Help added
Themes added and Test theme removed
Added themes data files to setup.py
Support for Samuel Ainsworth's new UI themes
Samuel Ainsworth's new UI added as a theme
Templates updates in sync with master for Non-NewUI themes