install libidn-dev on travis
install libidn-dev on travis

SuperTux88/diaspora,diaspora/diaspora,despora/diaspora,SuperTux88/diaspora,Flaburgan/diaspora,geraspora/diaspora,despora/diaspora,jhass/diaspora,jhass/diaspora,diaspora/diaspora,jhass/diaspora,Flaburgan/diaspora,despora/diaspora,geraspora/diaspora,jhass/diaspora,diaspora/diaspora,SuperTux88/diaspora,geraspora/diaspora,geraspora/diaspora,despora/diaspora,Flaburgan/diaspora,diaspora/diaspora,SuperTux88/diaspora,Flaburgan/diaspora