Move stacking_history to _internal_parameters.
Automatic style corrections courtesy of autopep8.
Rename _internal_parameters -> _Internal_parameters
Merge branch 'master' into Reorganize_Metadata
Make hdf5 write _internal_parameters when version = 1.1
Automatic style corrections courtesy of autopep8.
Merge branch 'master' into Reorganize_Metadata
BUG-FIX: DictionaryTreeBrowser was raising an exception when setting an attribute with a seemly invalid name.
Merge pull request #209 from francisco-dlp/BUG_FIX_DictionaryTreeBrowser

Bug fix dictionary tree browser