New _active_edges and _active_background_components.
Automatic style corrections courtesy of autopep8.
BUG-FIX: some Model methods were raising exceptions when a range was out of the axis limits.
Merge branch 'master' into BUG_FIX_remove_fine_structure_data
Add suspend/resume auto fine structure width.
Automatic style corrections courtesy of autopep8.
Merge branch 'master' into ENH_Model
Document suspend fine structure.
Merge pull request #307 from francisco-dlp/ENH_Model

Suspend automatic fine structure width adjusment