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.
BUG-FIX: Signal.decomposition was not raising an exceptions when attempting to decompose a signal with navigation_dimension < 2. Also, clarify this requirement in the User Guide.
Merge branch 'master' into Reorganize_Metadata
Merge pull request #208 from francisco-dlp/BUG_FIX_decompsition_wrong_nav_dim

BUG-FIX: Signal.decomposition was not raising an exceptions when attempt...
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
Add metadata structure tree to User Guide.
Rename metadata.TEM -> metadata.Acquisition_instrument.TEM and metadata.SEM to metadata.Acquisition_instrument.SEM.
Automatic style corrections courtesy of autopep8.
Move title, date, time, original_filename to metadata.General
Automatic style corrections courtesy of autopep8.
Move metadata.signal_type to metadata.Signal.signal_type
Automatic style corrections courtesy of autopep8.
Move signal_kind, signal_origin and record_by to metadata.Signal. Move metadata.Variance_estimation to metadata.Signal.Noise_properties.Variance_linear_model and Signal.variance to metadata.Noise_properties.variance.
Automatic style corrections courtesy of autopep8.