service.start salt-minion hangs from console on CentOS

Fixes #4410
Merge pull request #4408 from terminalmage/docs

Add info on specifying a list of file sources
Merge pull request #4412 from dlindquist/develop

service.start salt-minion hangs from console on CentOS
Remove unnecessary MacOS metadata file
Merge pull request #4415 from terminalmage/quickfix

Remove unnecessary MacOS metadata file