Fix untranslatable strings
The default calendar name now can be translated
Added a space between timezone and this will not affect
existing translations
Non-ASCII characters in calendar names prevented CalDAV from finding

Create a calendar with a name, e.g. ŞĞİüö (some special letters) and
try to get the CalDAV link. Accessing the link gave not found error.
Merge pull request #393 from owncloud/fix-uri-encoding

Fix uri encoding