Post vs2013 39 42 43

This pull request is much like #46, in that it includes the following PRs from @OJ:

  * #39, Win 8.1 and 2012R2 compat for sysinfo_version
  * #42, Incognito v2 update
  * #43, getproxy command

It avoids the following:

  * #34, clean shutdown
  * #44, webcam fix

#34 depends on @jlee-r7 eyeballs.

#44 depends on #38, which also depends on #34.

So right now, #34 is a pretty major blocker, but does not hold up #39, #42, and #43.

These PRs are all already demoed and tested; the purpose of this PR-of-PRs is just to avoid needless extra builds and testing. I'm landing it pretty much immediately.