Commented out cached expression logic
testing with test_evalexpr
Use numpy equivalent of functions from math if possible.
Simplified complex_step, finite_step and is_complex_stepable
code for evaluating gradients of arrays works. Needs to be tested.
Error message for wrong Jacobian size
fixed failure when array shape is specified using tuple values of None
Merge pull request #1620 from naylor-b/req_true_vtree

fixed failure when array shape is specified using tuple values of None
Merge pull request #1618 from Kenneth-T-Moore/bench

Error message for wrong Jacobian size
added test for broken assembly with boundary vartrees
Finished test for evaluate_gradient
Merge branch 'dev' of https://github.com/OpenMDAO/OpenMDAO-Framework into complex_step
works now
works now
Merge pull request #1621 from Kenneth-T-Moore/bench

Fix for case where requested inputs and outputs are missing their derivatives.
Merge branch 'missing_deriv_fix' of https://github.com/JustinSGray/OpenMDAO-Framework into vtree_boundary
fix for assemblies in the metamodel's model slot
fix for assemblies in the metamodel's model slot
Merge pull request #1622 from Kenneth-T-Moore/bench

Metamodel fix for assemblies as models
Improved test coverage of derivatives code. Fixed _is_complex_stepable