Update misc.js

Parsing svg with one element or many element in the same way helps the logic.
Some ellipses width 100% instead of pixels get broken ( 74, 75 examples ) but i think this is another topic and should be taken separately.

http://www.deltalink.it/andreab/fabric/a.html has all the fix togheter and render fine, or better than http://www.deltalink.it/andreab/fabric/b.html