Remove workspace mode, change some options

[nrc]

r? @Xanewok

Discussed in #132

[Xanewok]

Looks good, this simplifies the building routine!

However, if I understand correctly, build_bin and build_lib seem to be completely ignored after the change. Wouldn't we want to just remove them, instead?

(As a side note, it'd be hood to investigate recent AppVeyor failures with 'missing id field')

[emk]

Hello! A quick question: Does "remove workspace mode" mean "remove workspace support" (yikes) or "merge the workspace and non-workspace code into a single mode" (wonderful news)?

[Xanewok]

@emk Thankfully, the latter 😄

[nrc]

However, if I understand correctly, build_bin and build_lib seem to be completely ignored after the change. Wouldn't we want to just remove them, instead?

Yeah, they did nothing in workspace mode, so they still do nothing. I didn't remove them in case we want to add them back (or handle gracefully with an error message or something).

As a side note, it'd be hood to investigate recent AppVeyor failures with 'missing id field'

Have you seen this a lot? I saw it once when working on this PR, wasn't sure if it was new or not.

[Xanewok]

Have you seen this a lot? I saw it once when working on this PR, wasn't sure if it was new or not.

I saw this once before, probably Windows tests need adjusting after #856?

[Xanewok]

The Windows tests probably need to be adjusted, but that's not related to this PR. Thanks for cleaning it up!