Update link URLs to target the correct branch.
Fixed the URL to apache-bootstrap so it points to the correct repository.
Remove CoreOS from title where there is now a sub-title for an example.
Fixed error in example run command; missed out the '--name'.
Update README custom configuration instructions so the custom scripts are located on the Docker host instead of being stored on an NFS server.
Fixed issue with links going to an incorrect repository.
Merge branch 'centos-6'

Conflicts:
	README.md
Updated the README with links to the correct branch.