update Craft extras readme to include Gulp Rev plugin info
update Craft extras readme to include Gulp Rev plugin info

cubbrio/cubbrio.github.io,jakefleming/mezzotent,greypants/gulp-starter,clarkras/table_merge,greypants/gulp-starter,caltemose/italy-calendar-2016,voodee/gulp-starter,cubbrio/cubbrio.github.io,albertvazquezm/vue-portfolio,vigetlabs/gulp-starter,clarkras/table_merge,albertvazquezm/vue-portfolio,clarkras/table_merge,voodee/raketa,dmitriz/gulp-starter,voodee/gulp-starter,samicoman/nodetest,caltemose/italy-calendar-2016,clarkras/table_merge,greypants/gulp-starter,jakefleming/mezzotent,samicoman/nodetest,voodee/raketa,vigetlabs/gulp-starter,voodee/raketa,samicoman/nodetest,caltemose/italy-calendar-2016,samicoman/nodetest,uurrnn/urnre,vulkanbureau/gulp-starter,jtinianow/jtinianow.github.io,dmitriz/gulp-starter,vulkanbureau/gulp-starter,vigetlabs/gulp-starter,vulkanbureau/gulp-starter,voodee/gulp-starter,uurrnn/urnre,jakefleming/mezzotent,dmitriz/gulp-starter,jtinianow/jtinianow.github.io,cubbrio/cubbrio.github.io,dmitriz/gulp-starter,caltemose/italy-calendar-2016,voodee/raketa,vigetlabs/gulp-starter,albertvazquezm/vue-portfolio,cubbrio/cubbrio.github.io,clarkras/table_merge,jakefleming/mezzotent,vulkanbureau/gulp-starter,albertvazquezm/vue-portfolio,voodee/gulp-starter,greypants/gulp-starter