more map work. now only re-render map surface if size changed or any contents

more map work. now only re-render map surface if size changed or any contents
changed. still renders all, but better now. keeps map surfacer around for
shits and giggles until map unset or object deleted. als be able to set
smooth map and disable alpha (for smart objects)

git-svn-id: svn+ssh://svn.enlightenment.org/var/svn/e/trunk/evas@43362 7cbeb6ba-43b4-40fd-8cce-4c39aea84d33