The core Wormhole exchange will retain a blocking/non-Twisted
implementation, but the file-transferring Transit class is going to be
Twisted-only (maybe Twisted+asyncio). I want to improve the
protocol (add more parallelism, reduce round-trips), and the blocking
implementation is a messy bundle of threads and ick.
When this process is done (eventually), I'll be splitting out the
blocking Wormhole class into a separate distribution, which doesn't
depend upon Twisted.
The .appveyor.yml tells the tox.ini to install pypiwin32 directly,
rather than through a "twisted[windows]" extra. I wasn't able to get the
"extra" syntax to work properly under appyeyor, even though it worked ok
for me locally.
We use an extra "meta" tox environment to run "wormhole --version". This
confirms that versioneer is getting the right value, since we're now
running it from an installed sdist, rather than a checked-out git source
tree.
