Added kernel and kernel headers to apt-get upgrade command.
Remove Ubuntu 13.10 as it is EOL as of July 17, 2014.
https://lists.ubuntu.com/archives/ubuntu-announce/2014-June/000185.html

Also removed dangling preseed.cfgs from previously EOL'd releases.
Merge pull request #245 from juliandunn/eol-ubuntu-13.10

Remove Ubuntu 13.10 as it is EOL as of July 17, 2014.
Move EOL Ubuntu boxes to OLD-BOXES
Added OpenSuSE boxes to documentation.
Merge pull request #246 from juliandunn/update-documentation

Update documentation
Implement Solaris 10 support.
Add OS X VirtualBox builders
Update version of Packer used by Travis
update SLES url