Increase base for specifity

Following http://www.w3.org/TR/selectors/#specificity, the specifity is concatenating a,b and c. It notes that the base should be large enough. So it should be something like 2,9,3= 293, but 2,11,3 (=313) should be lower then 3,0,0 (300). This make 2,11,3 = 21103 and 3,0,0 = 30000. So it is still not always perfect, but better ;)