package: attempt to fix Powershell npm test
test: make root level `npm test` work

Working towards making appveyor work. This same setup works
for my `ref-struct` module, for example, so it should work here.
travis: match the `npm test` command
package: another build approach
travis: ensure tests are built
travis: remove extraneous node-gyp call
travis: more fix attempt
appveyor: remove PowerShell line

See: https://twitter.com/appveyor/status/475150106904510464
package: try to use an older node-gyp

ansi "^0.3.0" is tripping up <= 0.8.0. Other than that we're close...
Merge branch 'master' into windoze