Revert no_eval, disable precompilation

It was found that setup will segfault when Unicode is parsed by SymEngine. Getting rid of all of the evals was necessary for precompilation, and so that needs to be reverted as well. The no_eval branch holds the "master" branch which will be merged after the next SymEngine release has the parser fix. using DiffEqProblemLibrary was added to the tests since this is a pretty comprehensive test of ParameterizedFunctions and would have found this problem (indeed, it found this problem in the tests for the other packages).