[tx-robot] updated from transifex
[tx-robot] updated from transifex
[tx-robot] updated from transifex
[tx-robot] updated from transifex
[tx-robot] updated from transifex
[tx-robot] updated from transifex
[tx-robot] updated from transifex
Use display name instead of user ID in activity emails

Fix #127
Merge pull request #130 from owncloud/issue/127

Use display name instead of user ID in activity emails

* owncloud/issue/127:
  Use display name instead of user ID in activity emails
  [tx-robot] updated from transifex
  [tx-robot] updated from transifex
  [tx-robot] updated from transifex
  [tx-robot] updated from transifex
  [tx-robot] updated from transifex
  [tx-robot] updated from transifex
  [tx-robot] updated from transifex