Test
This commit makes a number of updates to the code.

1.	It now can now estimate models where all of the parameters are fixed.
2.	I’ve added the average variance calculation to the log file
3.	I’ve removed the need for a choice column. You still need a column called ID.
4.	I’ve added sawtooth’s constraining method – simultaneous tying.
5.	The markov chains for fixed coefficients are now plotted to the screen.
6.	I’ve adjusted the diagnostic checks so you can turn off the “please press 1 to proceed” prompt. This allows for batch estimation in a systematic way.