[Engine-XMPP] circumvent bug in facebook's own-message echo
[Build] Script to show contributors
Merge remote-tracking branch 'github/master'
[L10N] Updated German translation from Transifex
[L10N] French is now maintained without Transifex
[L10N] Updated Chinese Simp translation from Transifex
Merge pull request #32 from oli-obk/bugfix/facebook_double_echo