windows appveyor build failing

[jmquigs]

Affects #40 but will also affect master when the next build is done. I thought this was due to the fact that appveyor had updated to VS2015 Update 1, but I did the same update on my system and don't see the problem.
note: LINK : fatal error LNK1181: cannot open input file 'ws2_32.lib'

full log:
https://ci.appveyor.com/project/passcod/rsnotify/build/1.0.18/job/82l87bwbob81dvag

@retep998, any ideas?

[retep998]

I'm on it. It appears to be due to appveyor having a newer windows 10 SDK which isn't supported yet.

[retep998]

rust-lang/rust#30229

[passcod]

@retep998 What's your recommendation, here: apply the temporary fix until the issue is fixed upstream, or wait for upstream?

[retep998]

It's up to you. The PR could take several days, especially due to potential bikeshedding on what the proper way to detect the SDK stuff is.

[jmquigs]

The vcvars fix seems safe enough, even after upstream is fixed.