remove %appswebroot% as it is completely useless
Merge pull request #388 from owncloud/remove-appswebroot

remove %appswebroot% as it is completely useless
[tx-robot] updated from transifex
Show less detailed error msg. Refs. #395
Register all backends to OCP\Contacts
Initialize JSONReponse data with null
Try parse invalid BDAYs already imported. Refs #395
Fix invalid BDAYs before import. Fixes #395
Merge branch 'master' of https://github.com/owncloud/contacts into import
clean code, improve comments and documentation