add changelog entry about unittest change, bump version

CHANGELOG

@@ -34,6 +34,8 @@ Changes between 2.0.1 and 2.0.2
 
 - more precise (avoiding of) deprecation warnings for node.Class|Function accesses
 
+- avoid std unittest assertion helper code in tracebacks (thanks Ronny)
+
 Changes between 2.0.0 and 2.0.1
 ----------------------------------------------
 

pytest.py

@@ -1,7 +1,7 @@
 """
 unit and functional testing with Python.
 """
-__version__ = '2.0.2.dev3'
+__version__ = '2.0.2.dev4'
 __all__ = ['main']
 
 from _pytest.core import main, UsageError, _preloadplugins

setup.py

@@ -22,7 +22,7 @@ def main():
         name='pytest',
         description='py.test: simple powerful testing with Python',
         long_description = long_description,
-        version='2.0.2.dev3',
+        version='2.0.2.dev4',
         url='http://pytest.org',
         license='MIT license',
         platforms=['unix', 'linux', 'osx', 'cygwin', 'win32'],