Change .travis.yml to install matplotlib 1.1.1 and pandas 0.12
Change .travis.yml to install matplotlib 1.1.1 and pandas 0.12

benslice/ggplot,benslice/ggplot,wllmtrng/ggplot,ricket1978/ggplot,xguse/ggplot,smblance/ggplot,eco32i/ggplot,Cophy08/ggplot,mizzao/ggplot,assad2012/ggplot,ricket1978/ggplot,udacity/ggplot,xguse/ggplot,mizzao/ggplot,bitemyapp/ggplot,andnovar/ggplot,kmather73/ggplot