Promote modified version of Kokodi theme as default theme

themes/default/Makefile.am

themes/default/README

themes/default/bottom-active.png

themes/default/bottom-active.svg

themes/default/bottom-active.xpm

themes/default/bottom-inactive.png

themes/default/bottom-inactive.svg

themes/default/bottom-inactive.xpm

themes/default/bottom-left-active.png

themes/default/bottom-left-active.svg

themes/default/bottom-left-active.xpm

themes/default/bottom-left-inactive.png

themes/default/bottom-left-inactive.svg

themes/default/bottom-left-inactive.xpm

themes/default/bottom-right-active.png

themes/default/bottom-right-active.svg

themes/default/bottom-right-active.xpm

themes/default/bottom-right-inactive.png

themes/default/bottom-right-inactive.svg

themes/default/bottom-right-inactive.xpm