added log density functions to dusthm project
added prior to population parameter
convert theta to covariance matrix on device
added GibbsSampler constructor for subclassed objects
set initial value for dust population level parameters
moved initialization of RNG on GPU to gibbs sampler object
finished initial stab at MCMC sampler
successful compile
added python script to make the test data
fixed error in prior on correlation parameter
moved initialization of cholesky factor of theta
works for constant CBT
successful runs for dusthm
Merge branch 'work-with-old-dusthm'