update fedora doc: docker and docker-io conflict

Signed-off-by: Lokesh Mandvekar <lsm5@redhat.com>
docker and docker-io conflict update for epel

Signed-off-by: Lokesh Mandvekar <lsm5@redhat.com>
Fedora first letter capitalize and misc. rewording

Signed-off-by: Lokesh Mandvekar <lsm5@redhat.com>
Merge pull request #3248 from lsm5/docker-fedora-conflict

Docker fedora conflict