DOC: Update gitignore with documentation changes
DOC: Update gitignore with documentation changes

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