Add LBL's Lawrencium Cluster

This pull request adds new templates for LBL's [Lawrencium](https://sites.google.com/a/lbl.gov/high-performance-computing-services-group/lbnl-supercluster/lawrencium) cluster.

This cluster currently provides **8x C2050** "Fermi" GPUs and **2x K20** "Kepler" GPUs.