Issue 1487 - Suggested Fix - Return false when comparing Object against values that can't be unpacked

[alexgware]

This is a suggested fix for Issue 1847

In cases where eq is used for an object that cannot be unpacked (i.e. is not an instance of Mapping) simply default to returning false.

Depending on style/preference, another way this could be implemented is:

try:
    return dict(**self) == dict(**other)
except TypeError:
    return False

I went with the Mapping approach as it seemed to tie in more nicely with the inheritance from MutableMapping for Object, but both are pythonic and I'm happy to switch the fix over if you have a preference.

I made the assumption that the decision to do equality explicitly against the unpacked versions of the objects was in part to maintain backwards compatibility with old style Fiona representations of geometries (or similar). So I tried to stay away from anything that would create more direct comparisons between object types (e.g. return false if it's not a dict/Object), leaving the option open for other Mapping based objects to also resolve to True when compared.

[sgillies]

Thank you @agware ! This is right on the mark and very well done.