logmerger 0.6.0

Thanks to the assist from PyPI admins, I've been able to reupload this project using its new underscoreless name logmerger, to match its installed project name and command line command. So it can now be installed using pip as:

pip install logmerger

I've updated all the old name instances I could find in examples, help text, READMEs and docs, but otherwise there are no functional changes in this release.