CircularDeque: shouldn't `front` and `back` be `first` and `last`?

[sairus7]

front(a) # get the element at the front
back(a) # get the element at the back

But for other arrays there are different notations - first and last

[oxinabox]

Yes, let's change that.
Make a PR deprecating them, and a minor release.

And sometime later I will do a depreciation round and remove them

[sairus7]

By the way, what's difference between CircularDeque and CorcularBuffer? Looks like the latter covers all functionality of the former?

[oxinabox]

If you overfill a CircularDeque you get a am error.
If you overfill a CircularBuffer it overwrites the older data.

Buffers have uses in a few places where losing old data doesn't matter.
Like audio processing.
If you fallbehind it is better to just give up on the oldest ones.

[cfauchereau]

This issue has been solved by #565. It can be closed.