Change the Vagrant basebox url in the CONTRIBUTING.md
Change the Vagrant basebox url in the CONTRIBUTING.md

ggaabe/coderwall,trinitronx/coderwall,alouanemed/coderwall,coderwall/coderwall,assemblymade/coderwall,alouanemed/coderwall,coderwall/coderwall,agileknight/coderwall,pombredanne/coderwall,assemblymade/coderwall,coderwall/coderwall,AVGP/coderwall,wiserfirst/coderwall,santoshdeshpande/coderwall,ronaldotijucas/coderwall,trinitronx/coderwall,agileknight/coderwall,seuros/coderwall,pushkar-mishra/coderwall,ggaabe/coderwall,ronaldotijucas/coderwall,pushkar-mishra/coderwall,seuros/coderwall,pushkar-mishra/coderwall,trinitronx/coderwall,agileknight/coderwall,trinitronx/coderwall,DylanKojiCheslin/coderwall,assemblymade/coderwall,frootloops/coderwall,seuros/coderwall,frootloops/coderwall,santoshdeshpande/coderwall,frootloops/coderwall,DylanKojiCheslin/coderwall,pombredanne/coderwall,pombredanne/coderwall,seuros/coderwall,pushkar-mishra/coderwall,agileknight/coderwall,santoshdeshpande/coderwall,wiserfirst/coderwall,pombredanne/coderwall,alouanemed/coderwall,assemblymade/coderwall,sekouzed/coderwall,DylanKojiCheslin/coderwall,sekouzed/coderwall,wiserfirst/coderwall,ronaldotijucas/coderwall,AVGP/coderwall,AVGP/coderwall,wiserfirst/coderwall,sekouzed/coderwall,coderwall/coderwall,alouanemed/coderwall,ggaabe/coderwall,sekouzed/coderwall,ronaldotijucas/coderwall