Update .jshintrc whitespacing

Small whitespace fix to fit in with the rest of the doc's formatting.
Properly reset `forinifcheckneeded` state

If not reset, this value can lead to out-of-bounds array indexing in
subsequent invocations of the JSHint function.
AppVeyor: remove global cache.

We don't install any global modules.
Add node.js 0.11 to AppVeyor like Travis is using.