fix for #271 add proxy with auth, based on http://stackoverflow.com/questions/34079/how-to-specify-an-authenticated-proxy-for-a-python-http-connection
Add support for new -q option to redhat

Also expand -y to --assumeyes for consistency
Merge pull request #346 from cottsay/redhat-quiet-feature

Add support for new -q option to redhat
Merge pull request #335 from k-okada/auth_proxy

#271 add proxy with auth,