Bump version and add release notes for 0.5.0

CHANGELOG.rst

 Changes
 =======
+0.5.0 - 2018-01-02
+------------------
+
+* Add configurable list of classmethod and staticmethod decorators
+
+* Print the offending name as part of the error message
+
+* Correct N804/N805 for __init_subclass__
+
+
 0.4.1 - 2016-06-26
 ------------------

pep8ext_naming.py

@@ -12,7 +12,7 @@ try:
 except ImportError:
     from flake8.util import ast, iter_child_nodes
-__version__ = '0.4.1'
+__version__ = '0.5.0'
 LOWERCASE_REGEX = re.compile(r'[_a-z][_a-z0-9]*$')
 UPPERCASE_REGEX = re.compile(r'[_A-Z][_A-Z0-9]*$')