All control structures of _time() should return values

In case of exception, function _time() doesn't return anything,
and this causes float conversion failure at L:61
Merge pull request #63 from dukavi/master

junitxmlreporter: All control structures of _time() should return values
prevent DeprecationWarning for compiler package on python 2.7

nose2/util.py:14: DeprecationWarning: The compiler package is deprecated
and removed in Python 3.x.

  from compiler.consts import CO_GENERATOR
Merge pull request #68 from max-arnold/master

Fix for DeprecationWarning on python 2.7 (issue #64)
Update python version support list to include 3.3
Update changelog
Bump version