add Oracle Linux 6.3 x86_64 base box
fix download URL
Add a newer Gentoo box, remove the obsolete one
Changed my boxes URL to control how many people are downloading it.
Merge pull request #94 from willian/master

I have to change my boxes from s3 to another server.
Merge pull request #93 from vaskas/master

Add an up to date Gentoo box
Merge pull request #92 from terrywang/master

Added Oracle Linux 6.3 x86_64 Base Box