Install Guest Additions on Fedora 17/18/19

1) Yum update
2) Devices > Guest Additions
3) Become root
4) mkdir /media/VirtualBoxGuestAdditions
    mount -r /dev/cdrom /media/VirtualBoxGuestAdditions
5) yum install gcc kernel-devel kernel-headers dkms make bzip2
6) KERN_DIR=/usr/src/kernels/`uname -r`-`uname -m`
     export KERN_DIR
7) cd /media/VirtualBoxGuestAdditions
    ./VBoxLinuxAdditions.run
8) reboot