Change CMAKE min version to 2.8.11 for Titan Builds
Suggest to change cmake_minimum_required(VERSION 2.8.12) to cmake_minimum_required(VERSION 2.8.11) so that we can successfully build SpatialOps with CUDA on Titan.
Suggest to change cmake_minimum_required(VERSION 2.8.12) to cmake_minimum_required(VERSION 2.8.11) so that we can successfully build SpatialOps with CUDA on Titan.