update language rake and locale files
Add private groups and logic about secret groups
Merge pull request #1205 from loomio/new-private-groups

Add private groups and logic about secret groups
update roadie gem
Merge pull request #1203 from loomio/language-update

update language rake and locale files
more-wip
Merge remote-tracking branch 'origin/master' into nice-urls

Conflicts:
	db/schema.rb