correct a little error in tutorial text
fix non-existent collaborator error
Merge pull request #305 from migeruhito/tutorial_typo

Problem with notebook's help
Fix typo that would cause crash

But only in the situation that one chose to do something the GUI doesn't support!  
Still worth it, though, and clear enough I'm not going to ask for review in this case.
Catch / in collaborators' names
Merge pull request #306 from migeruhito/collaborators

Crash when a non-existent collaborator is added to a worksheet
Add gettext back in files descended from twist.py
Merge branch 'master' into gettextbackin

Conflicts:
	sagenb/flask_version/worksheet.py
Add a few more missed translatable messages
Merge pull request #308 from kcrisman/gettextbackin

Add gettext back in files descended from twist.py
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