Move slow PPML tests to nightly since PPML is not heavily used anyway
PPML Update: Largely rewritten PPML module with test permutor and new suite of test cases. Functional with the exception of certain cases (optimized numerical solutions to models with data specified in covariance matrix plus means format). Non-functional cases should be caught by the module's filter and allowed to run as normal. Known Issues: -Two of the test cases do not pass. One of the failures is possibly due to issues with the conversion from Objectives to Fits/Expectations. -Tests occasionally find questionable solutions, with very low (negative) Minus2LL values, lower than the minimum found by OpenMx. Allowing the optimizer to try to improve on these questionable solutions throws an error (Expected covariance matrix is non-positive definite).
Mering dependency tracking into the trunk.