Fix broken gif output with pillow 3.4.x
Fix broken gif output with pillow 3.4.x

 They changed number of elements output in getdata function: https://github.com/python-pillow/Pillow/pull/2103

voxmedia/thumbor,okor/thumbor,scorphus/thumbor,gi11es/thumbor,scorphus/thumbor,thumbor/thumbor,kkopachev/thumbor,davduran/thumbor,gi11es/thumbor,scorphus/thumbor,okor/thumbor,kkopachev/thumbor,davduran/thumbor,marcelometal/thumbor,davduran/thumbor,okor/thumbor,thumbor/thumbor,thumbor/thumbor,gi11es/thumbor,kkopachev/thumbor,marcelometal/thumbor,kkopachev/thumbor,davduran/thumbor,voxmedia/thumbor,marcelometal/thumbor,scorphus/thumbor,voxmedia/thumbor,thumbor/thumbor