Added optional parameter form_field to _pack_image
Added optional parameter form_field to _pack_image

hackebrot/tweepy,aganzha/tweepy,bconnelly/tweepy,Choko256/tweepy,nickmalleson/tweepy,nickmalleson/tweepy,raymondethan/tweepy,wjt/tweepy,srimanthd/tweepy,kskk02/tweepy,zhenv5/tweepy,kylemanna/tweepy,thelostscientist/tweepy,markunsworth/tweepy,LikeABird/tweepy,iamjakob/tweepy,kcompher/tweepy,edsu/tweepy,svven/tweepy,robbiewoods05/tweepy,conversocial/tweepy,yared-bezum/tweepy,vikasgorur/tweepy,tweepy/tweepy,arunxarun/tweepy,awangga/tweepy,cinemapub/bright-response,damchilly/tweepy,aleczadikian/tweepy,sa8/tweepy,abhishekgahlot/tweepy,takeshineshiro/tweepy,truekonrads/tweepy,markunsworth/tweepy,abhishekgahlot/tweepy,nickmalleson/tweepy,IsaacHaze/tweepy,vivek8943/tweepy,vishnugonela/tweepy,elijah513/tweepy,tuxos/tweepy,nickmalleson/tweepy,cogniteev/tweepy,atomicjets/tweepy,techieshark/tweepy,cinemapub/bright-response,rudraksh125/tweepy,obskyr/tweepy,tsablic/tweepy,sidewire/tweepy