switch mu into the last field of ALPHA to allow extension
constrain rho to +/-0.95
adds hat() to Matrix
do the regression via matrix computatation
R changes for talk figures
update to use design matrix X
separate tau for each source
extend design matrix for effect of intervention
cosmetics - better warning messages
update output path in isource.R
read design matrix from file
support for design matrix in R script
tweak warning levels for mu to be a bit more generous
tweak priors for rho and tau
correct graph offsets for parameters
fix tau estimation
REMOVEME: faster testing through fewer iterations
Revert "REMOVEME: faster testing through fewer iterations"

This reverts commit 0df1f0bd04cbe624e14bf4464eb7f3b1f70ebf0e.
squish into refining of priors for tau/rho
update isource.R for posteriors of seasonal/intervention effects