core (common): new Symbol widget: it uses font icon to display a symbol by name (should move to direct svg rendering once it's stable in Kivy). bg_color property allows to change background color. margin property allows to display a margin around the symbol

-e git+https://github.com/kivy/kivy.git#egg=kivy
-e hg+https://repos.goffi.org/sat#egg=sat
-e .