added missing workspace and expo png files from default theme
updated corner ripple png to cinnamon 2.0 standards
finished alt-tab changes for cinnamon 2.0 compatibility
added CinnamonMountOperation Dialogs from default. Not specifically themed for Cinnamon
updated Menu style to Cinnamon 2.0 standard
updated Sound applet style to Cinnamon 2.0 standard
added missing theme elements default theme. Will need to make theme specific changes.