started working on normal-normal example
organized project into directories
moved functions from kernels.cu to kernels.cuh
Revert "moved functions from kernels.cu to kernels.cuh"

This reverts commit f15b6544f876e80004c2ba1d1316edd0e4bbc10f.
renamed gibbs_sampler to tests
added blueprint for using CUDAHM API
moved dimensions know at compile time to globals
added Normal-Normal model data files
added option to save chi trace
added some additional comments to GibbsSampler class
Merge branch 'normnorm'