Fix calendar in safari
Fix calendar in safari

Added an autoprefixer and updated the version of elemental-calendar to
fix calendar display in safari as well as an issue with the August 2015
calendar.

jrjohnson/frontend,gabycampagna/frontend,thecoolestguy/frontend,djvoa12/frontend,ilios/frontend,jrjohnson/frontend,dartajax/frontend,gboushey/frontend,thecoolestguy/frontend,dartajax/frontend,ilios/frontend,djvoa12/frontend,stopfstedt/frontend,gabycampagna/frontend,gboushey/frontend,stopfstedt/frontend