brought over some stuff from earlier performance branch
caching _all_child_vars
caching boundary inputs/outputs
caching srcs and boundary vars
caching for list_connections
Merge pull request #1600 from Kenneth-T-Moore/bench

Fix to make sure we don't run the model in FPI's check_config
Merge branch 'dev' of https://github.com/OpenMDAO/OpenMDAO-Framework into dev
cleaned up some config_changed stuff
test for archtectures
typo
fixed test, CO does not work
Merge pull request #1601 from Kenneth-T-Moore/bench

Fixed a small mistake
stl_group now exposes all control points
Merge pull request #1602 from JustinSGray/geom_fix

stl_group now exposes all control points
Merge branch 'perf2' of github.com:naylor-b/OpenMDAO-Framework into perf2
new vartree tests
small test update
Merge branch 'geom_fix' of https://github.com/JustinSGray/OpenMDAO-Framework into vtree_missing_deriv
fixed justin's bugs
fixed vtree issue