Investigate potential memory leaks

[luciansmith]

Using 'Deleaker' on Windows claims that the following code leaks memory a lot:

C:\Users\Lucian\Desktop\roadrunner\source\llvm\MCJit.cpp, line 92
C:\Users\Lucian\Desktop\roadrunner\source\llvm\MCJit.cpp, line 93
C:\Users\Lucian\Desktop\roadrunner\source\llvm\MCJit.cpp, line 127
C:\Users\Lucian\Desktop\roadrunner\source\llvm\MCJit.cpp, line 232
C:\Users\Lucian\Desktop\roadrunner\source\llvm\Jit.cpp, line 38

Also:
C:\Users\Lucian\Desktop\roadrunner\source\conservation\ConservationExtension.cpp, line 342
C:\Users\Lucian\Desktop\roadrunner\source\CVODEIntegrator.cpp, line 698

There's a lot more, but most are duplicates of those, in various contexts (running test_sundials_cvode_integration).

It might be easiest to tackle this with valgrind on ubuntu?