Working towards a 1.0.2 version.

This commit includes a number of changes.

Change log
•	Can now assert custom prior covariance matrices.
o	It gets written out
•	You can now use
o	positive or negative censored normals
o	positive or negative uniforms
•	The D file has proper column labels. They were being ignored.
•	Acceptance rate is being written to the screen and also the log file.
o	You can now also specify a different acceptance rate for the fixed and random parameters in the model
•	Time to complete is now based on the last gINFOSKIP draws
•	Start Values are displayed in the diagnostic output
•	Jeff’s plotC function has been added
•	Files are no longer overwritten when you use the same model name. File names get appended with the ~1, ~2, etc, biogeme-style.
•	Miscellaneous little things.