Add easyconfig for CUDA 5.5.22

CUDA 5.5.x adds support for a unified Linux installer, instead of using
different installers for each distro.
use namelower, version, versionsuffix templates
Merge pull request #1 from boegel/cuda5.5

use namelower, version, versionsuffix templates
Merge pull request #386 from ajdecon/cuda5.5

Add easyconfig for CUDA 5.5.22