docs(item-options): readme add table for side
docs(item-options): readme add table for side

description and replace "left" and "right" obsolete values by new "start" and "end" values.

driftyco/ionic,TillaTheHun0/ionic,TillaTheHun0/ionic,driftyco/ionic,driftyco/ionic,TillaTheHun0/ionic,driftyco/ionic,driftyco/ionic,TillaTheHun0/ionic