STY: PEP8
DOC: Add .. shownumpydoc to methods

Methods like __repr__, __str__, __getitem__ and other relevant private
methods should now be displayed in the documentation.
DOC: Add docstring for get_stop_indices
DOC: Add docstring to sixframes method
DOC: Add docstring for changes
DOC: Add Examples for translate method
DOC: Add examples section for get_stop_indices
DOC: Add examples for sixframes method
DOC: Add examples for is_start and is_stop
DOC: Add examples for changes method
ENH: copy paste context manager and tests from
my gist: https://gist.github.com/Jorge-C/10662095
MAINT: reorder and fix imports
TST: add BytesIO test
DOC: minor change in docstring.
TST: tests need main
ENH: use new context manager to deal with file opening.
STY: whitespace
DOC: add module docstring
(thanks @ElBrogrammer!)
DOC: Small docstring improvements
API: renamed `open_filepath_or` to `open_file`