Disable the wasted time datapoints and create a debugging parameter to re-enable them.
Add y_get_last_transaction_status()
update y_vts.c to use LR 11.52 interfaces.

In fact, this removes most of the y_vts.c code.

This library mostly added connection management for the situation where a script only has one VTS connection.
With the new LR 11.52 interface loadrunner gained a whole set of methods that did the exact same thing. As a result, all of the duplicate methods in y_vts.c have been removed.

I realize that this will break support for older loadrunner versions, but seriously, this code never was that good to begin with. Admitting it was crap and removing most of it is the right thing to do.
Add y_write_parameter_into_file()
Add the .gitignore file for convenience purposes.
Improve the error checking on y_write_parameter_into_file(), add some extra logging to it.