do not allow a driver to be added to a Component that is not an Assembly
Merge branch 'dev' into gui
Merge branch 'dev' into gui
try sleeping in gui datflow test, see if it prevents possible timing related failure
skip the problematic gui test_dataflow/_test_replace for Windows platforms
see if resizing window helps with gui functional test issues on EC2
clean up skiptest, fix seemed to work
Merge pull request #1314 from swryan/gui

disallow adding a driver to a component, fix gui test via browser resizing