changed model test so that it passes with new numpy / scipy
Dictionary tree browser now converts signals to dictionaries when used with to_dictionary()
Automatic style corrections courtesy of autopep8
Automatic style corrections courtesy of autopep8
parameter.as_signal() now correctly sets values as np.nan where the component is not active
added test
Automatic style corrections courtesy of autopep8
got rid of a few unnecessary lines
removed commented old lines
Merge pull request #376 from to266/BUGFIX_model_tests_new_scipy

Bugfix model tests new scipy
Merge remote-tracking branch 'tomas/ENH_DictionaryTreeBrowser_Signals' into 0.7.x
Merge branch '0.7.x'
more tests for the previously skipped parameters
Automatic style corrections courtesy of autopep8
Merge remote-tracking branch 'upstream/master' into model_as_dict