fixed expr conn bug and added some deriv comp checking (making sure the right functions exist, etc.
merged with dev
restored fd_step for parameters
for tests
tests pass
Merge pull request #1572 from Kenneth-T-Moore/solver

Fix for fd_step in add_parameters
fixing issue with replace, passthroughs, and nested configure calls
fix for provideJ in a  mixed dimension inputs on a connection
Merge branch 'dev' of github.com:OpenMDAO/OpenMDAO-Framework into fd
oopsie
working on implicit tests
Merge branch 'deriv_error_check' of github.com:naylor-b/OpenMDAO-Framework into deriv_error_check
fix for Bret
removing bad test
Merge pull request #1573 from Kenneth-T-Moore/fd

Support for more general array math in the derivatives of an expression connection
Merge branch 'deriv_error_check' of https://github.com/Kenneth-T-Moore/OpenMDAO-Framework into deriv_error_check
Added test
Merge pull request #1574 from Kenneth-T-Moore/fd

Added test for the previous pull request
fixed a couple more tests
cleanup