copy keyword for asarray, Tensor, and astype

[mtsokol]

WIP copy keyword for asarray, Tensor, and astype.

Fixes #46

[hameerabbasi]

Does Julia not have a way to do a deep copy?

[mtsokol]

Does Julia not have a way to do a deep copy?

Hmm let's discuss it during Finch meeting. But I would leave copying logic in Python and not rely on Julia copying, considering that we already have no-copy logic for NumPy and SciPy inputs in finch-tensor. Let's not disperse it over Python and Julia side.

[hameerabbasi]

Does Julia not have a way to do a deep copy?

Hmm let's discuss it during Finch meeting. But I would leave copying logic in Python and not rely on Julia copying, considering that we already have no-copy logic for NumPy and SciPy inputs in finch-tensor. Let's not disperse it over Python and Julia side.

Would you like to implement it later, or in this PR? If the former, let's raise an issue to keep track.

[mtsokol]

Would you like to implement it later, or in this PR? If the former, let's raise an issue to keep track.

Let's implement it in a follow-up PR. You mean to allow copying Julia input, right? Like finch.Tensor(julia_obj, copy=True)

[hameerabbasi]

I created #66 and #67 for the remaining issues, this looks good to go for me.