Handles edge case error handling where only=/ignore=/exclude= 0 and 1 (int).

Release Highlights

Added exclude= as an alternative for ignore= (for Marshmallow fans)
Added only= (for Marshmallow fans)
Added exclude= ignore= and only= to __init__ for selective import
Made exclude= ignore= and only= permissive (functions now accept lists OR single item strings for convenience)
y=CleverDict(x) now imports a fullcopy of x e.g. including _aliases/_vars
Refactored using new preprocess_options() function

Highlights in Version 1.8.1

Added to_json() and from_json()
Added to_lines() and from_lines()
Added to_dict()
Added set_autosave (which works on individual objects, not the whole class)
Added set_autodelete (which works on individual objects, not the whole class)
Added autosave (which works on individual objects, not the whole class)
Added the ability to fully recreate a CleverDict with to_json(fullcopy=True)
Added cartoon!
Added logo!
Removed dependency on click
Revamped README
Removed identify_self()
Removed print output except for for autosave, but with 'silent' option
delattr removes attributes created using setattr_direct
Attributes created using setattr_direct update correctly.
Applied ignore=[] to: to_lines, to_list, to_json, info, to_dict, and repr
More consistent repr
._aliases and ._vars accessible as regular attributes
Substantially more and better tests

CleverDict now inherits from the standard Python dict, rather than UserDict, and includes some useful methods for dealing with and displaying attributes, keys and the links between them.