use site config for facebook id and url and google analytics
Signed-off-by: Tee Jia Hen <wiztjh@gmail.com>

Conflicts:
	app/views/spree/shared/_footer.html.erb
	app/views/spree/shared/_google_analytics.html.erb
	app/views/spree/shared/my/_footer.html.erb

Signed-off-by: Tee Jia Hen <wiztjh@gmail.com>