Clean up any issues of losing table keys after masking or indexing

[jpivarski]

Making sure that JaggedArray._broadcast, Table.__setitem__ are robust against different types, etc.

[jpivarski]

I could merge this now, but I suspect I'll be needing to add more odds and ends.

[jpivarski]

Fixes a bug for @zhenbinwu, so I'll merge and deploy it now (awkward 0.8.9).

[zhenbinwu]

I am afraid the new version is not available on pip.

$ pip install --upgrade  awkward-array --user
Collecting awkward-array
  Could not find a version that satisfies the requirement awkward-array (from versions: )
No matching distribution found for awkward-array

[jpivarski]

The new awkward went up two hours ago—oh, the pip name is "awkward".

The repo, awkward-array, contains a family of packages: the base awkward, the Numba-enhanced awkward-numba (in development), the precompiled awkward-pybind11 (possible summer project), the GPU-enabled awkward-cuda (a glimmer in mine eye), etc. They need to be locked to the same version, which is why they're all in the same repo, but they need to be independently installable to satisfy different dependency requirements, hence different pip packages.

The names are also designed so that they can install into each other: the base package is awkward so that awkward-numba can be imported with import awkward.numba, etc.

[zhenbinwu]

Ops, sorry for my noise! Thanks a lot for the description.