Merge pull request #20 from aelgru/master

Bugfix: ensuring all host names are ordinary strings.
Extend CLI to support overriding RPM upload command via --rpm-upload-cmd
Merge remote-tracking branch 'remotes/origin/master'

Conflicts:
	src/config_rpm_maker/__init__.py
	src/config_rpm_maker/config.py
	src/config_rpm_maker/configrpmmaker.py
Revert "Merge remote-tracking branch 'remotes/origin/master'"

This reverts commit bee1703ac758af1f67833ad3f405285e1ec923bc, reversing
changes made to f1ad841e74636e2d7d9237fed908a123f0565312.