Log Message:
Update  0.16 to 0.18
--------------------
0.18 NEXT
      - Fix bug in `:not(...)[attr] (Aaron Crane)
      - Support `:nth-child(odd)` and `:nth-child(even)` (Aaron Crane)
      - Translation of `[attr$=tail]` works with XPath 1.0 (Aaron Crane)

0.17 Sat Aug 30 16:12:52 GMT+2 2014
      - Support unicode characters for id and class selectors (aereal)
      - Normalize space characters of the class attribute (hitode909)