Updated the language files to fix issue #U4-3979

Also corrected invalid URL's across all the language files as they pointed to pages on Umbraco.com/org that 404'ed.
I have just added a new section to the documentation and changed all these URL's to point to the new documentation URL, so once it is live I will update this pull request.

https://github.com/umbraco/Umbraco4Docs/pull/161