Rework color and fonts to be more pytonish. Add units conversions.

tests/test-entry.py

@@ -22,7 +22,6 @@ from sugar.graphics.toolbar import Toolbar
 from sugar.graphics.frame import Frame
 from sugar.graphics.button import Button
 from sugar.graphics.entry import Entry
-from sugar.graphics.style import Color
 
 def _entry_activated_cb(entry):
     print "_entry_activated_cb"

tests/test-label.py

@@ -21,7 +21,6 @@ import hippo
 from sugar.graphics.toolbar import Toolbar
 from sugar.graphics.label import Label
 from sugar.graphics.button import Button
-from sugar.graphics.style import Color
 
 import os
 theme = gtk.icon_theme_get_default()

tests/test-option-menu.py

@@ -24,7 +24,6 @@ import hippo
 
 from sugar.graphics.toolbar import Toolbar
 from sugar.graphics.optionmenu import OptionMenu
-from sugar.graphics.style import Color
 from sugar.graphics.button import Button
 
 def _option_menu_changed_cb(option_menu):