added nfs client support for the box so that vagrant nfs shares work
updated centos 6.2 iso urls to use the vault.centos.org url
[BENTO-3] ensure dkms and proper version of kernel headers are installed

These packages are needed in order to properly compile VirtualBox's
Guest Additions.
Ensure i386 boxes override the os_type_id attribute

This is set to a _64 name in the default definition.
Merge remote-tracking branch 'upstream/master'
Ensure i386 boxes override the os_type_id attribute

This is set to a _64 name in the default definition.
Merge branch 'upstream'
update gem lockfile after bundle build