added method to change content type and added .gitignore
added method to change content type and added .gitignore

pratikmallya/pyrax,emonty/pyos,rackerlabs/heat-pyrax,naemono/pyrax,briancurtin/pyrax,sivel/pyrax,rackspace/pyrax,vikomall/pyrax,0dataloss/pyrax,EdLeafe/pyrax,mandx/pyrax,ddaeschler/pyrax,opsdisk/pyrax,roelvv/pyrax