* Removed purple warnings from unit test compilation.
* "Fixed const corectness bug. Added more warning fixes."
* Fixed warning issue.
* Removed null checking and (char*) casting.
* Changed sizeof parameter to variable from data structure.
Gave each sim their own model directory, or in some cases just
a header file. Each sim in the test directory is now independent
of each other. Modifying one test will not affect any other test.
refs #191
Moved SIM_test_ip and a couple of other sims that depend on the same model set
to a new test directory. I'm doing a couple of sims at a time.
refs #191
