PERF: block-wise ops for scalar and series
This extends #28583 to handle `op(frame, series)` (whereas 28583 handles only `op(frame, scalar)`).

I got this passing locally, haven't gone back through to do e.g. lint fixups.  There are a few places where this surfaced bugs that can be fixed independently.


Hello @jbrockmendel! Thanks for updating this PR. We checked the lines you've touched for [PEP 8](https://www.python.org/dev/peps/pep-0008) issues, and found:

































There are currently no PEP 8 issues detected in this Pull Request. Cheers! :beers: 

##### Comment last updated at 2019-10-14 16:34:09 UTC Closing to clear the queue.