Add bayestar_sample_model_psd

New script for writing PSD XML files from model noise curves
disable broken test
Fixed sign error in output of cbcBayesThermoInt.py
text.usetex = True in cbcBayesThermoInt.py for plotting on LSC clusters.
Sort lal/.gitignore
Sort lalpulsar/.gitignore
Use I0(snr^2 |autocorrelation|) for timing likelihood
Factor out signal model
Whitespace
Faster, and less alias-y, method of computing autocorrelation
Implement new autocorrelation likelihood in Gaussian quadrature functions
Track API change in LALSimulation
Suppress underflow errors
Whitespace
Make sure maxpix is set even if resolution is given explicitly
Oops, incorrect treatment of log_offset
Use C99-style loop variable declaration
Parallelize TOA loop
Use Gauss-Legendre quadrature over cos(inclination)
WIP: report number of function evaluations