Log Message:
Update to 0.9.2

Upstream changes:
0.9.2 (2015-06-17):
  - Fix a traceback when a global is defined in one scope, and used in another.

0.9.1 (2015-06-09):
  - Update NEWS.txt to include 0.9.0, which had been forgotten.

0.9.0 (2015-05-31):
  - Exit gracefully, not with a traceback, on SIGINT and SIGPIPE.
  - Fix incorrect report of undefined name when using lambda expressions in
    generator expressions.
  - Don't crash on DOS line endings on Windows and Python 2.6.
  - Don't report an undefined name if the 'del' which caused a name to become
    undefined is only conditionally executed.
  - Properly handle differences in list comprehension scope in Python 3.
  - Improve handling of edge cases around 'global' defined variables.
  - Report an error for 'return' outside a function.