Tiburon updated with diskless CentOS 6.3 and Ubuntu 12.04 environments

Our cluster/cloud OS environment now has modules for CentOS 6.x and Ubuntu 12.04. The latter is the LTS system. We’ve got some other tools/bits to setup for this, including working to see if we can build an ARM based PXE booting stack. We are working on making a number of cluster/cloud file system setups as absolutely painless as possible. More later.