fix(logging): monkeypatch logging with NullHandler
fix(logging): monkeypatch logging with NullHandler

This will make usage of the `NullHandler` possible in python 2.6
and below.

jeblair/GitPython,zsjohny/GitPython,beni55/GitPython,roidelapluie/GitPython,avinassh/GitPython,StyXman/GitPython,beni55/GitPython,dpursehouse/GitPython,breavo/GitPython,gitpython-developers/gitpython,cdht/GitPython,StyXman/GitPython,cdht/GitPython,expobrain/GitPython,avinassh/GitPython,bwrsandman/GitPython,roidelapluie/GitPython,avinassh/GitPython,gitpython-developers/gitpython,ghtdak/GitPython,expobrain/GitPython,manasdk/GitPython,h4ck3rm1k3/GitPython,pengshp/GitPython,breavo/GitPython,pengshp/GitPython,StyXman/GitPython,zsjohny/GitPython,cdht/GitPython,gitpython-developers/GitPython,h4ck3rm1k3/GitPython,dpursehouse/GitPython,nvie/GitPython,gitpython-developers/GitPython,zsjohny/GitPython,pengshp/GitPython,jeblair/GitPython,ghtdak/GitPython,nvie/GitPython,manasdk/GitPython,bwrsandman/GitPython,bwrsandman/GitPython