Add MAINTAINERS

Making sure we're consistent across our project.
Don't show network related warnings when networking is disabled
Only mount hostname files if config exists
Merge pull request #1896 from dotcloud/1885-missing-hostfile

Only mount hostname files if config exists
Merge pull request #1894 from dotcloud/1891-remove_useless_warnings

Don't show network related warnings when networking is disabled
Merge pull request #1892 from dotcloud/fix-maintainers-files

Add MAINTAINERS