Refactor mach

[anilyil]

This PR moves the mdolab wrappers and examples to the new refactored version. @joanibal please take a look at these and test your thermal work. I will check all of the examples and tests again locally. I also formatted all of the relevant files I touched.

[anilyil]

All of the tests except these two pass locally:

The following tests failed:
test_meld_derivs.py:TestXferClasses.test_derivatives
test_tacs_derivs.py:TestTACs.test_derivatives

This is probably because I didnt do the complex installation properly. Let me know if I can fix my installation and I can try again.

[kejacobson]

For both meld and tacs, you can do make clean && make complex && make complex_interface to run those tests.

[joanibal]

Do the Tacs tests pass now @anilyil?

Don't worry about the thermal stuff. I use my own dev branch of MPHYS (which has changes incompatible with the main code) for that work.

[anilyil]

sorry for the delayed response, I compiled complex tacs and meld and those final two tests pass locally for me as well. I will review the changes here quickly again and merge this PR later today.

[anilyil]

All tests and example scripts run fine now. There are a few items I did not do in this PR, and to track those issues, I opened #61, #62, and #63. I will address those one by one in future PRs. This one is good to go.