Added setting spacegray_tabs_font_small/normal/large/xlarge
Added setting spacegray_sidebar_tree_xsmall/small/medium/large/xlarge
Added setting spacegray_sidebar_font_large/xlarge
Added setting spacegray_tabs_auto_width
Added setting spacegray_tabs_small/medium/normal/large/xlarge
spacegray_sidebar_tree_medium is now _normal
Removed spacegray_tabs_medium and tweaked tab heights
Remove unused soda_folder_icons settings
Added setting spacegray_color_expanded_folder
Added spacegray_sidebar_font_small/normal for consistency with _tabs_font
Merge pull request #75 from noct/master

Tab & Sidebar customization