Log Message:
Update to 0.8.1:

0.8.1 (2014-03-30):
  - Detect the declared encoding in Python 3.
  - Do not report redefinition of import in a local scope, if the
    global name is used elsewhere in the module.
  - Catch undefined variable in loop generator when it is also used as
    loop variable.
  - Report undefined name for `(a, b) = (1, 2)` but not for the general
    unpacking `(a, b) = func()`.
  - Correctly detect when an imported module is used in default arguments
    of a method, when the method and the module use the same name.
  - Distribute a universal wheel file.