Hacks and Todos

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Found todos and 3 hacks in 2 files.
File Comment
hack /* HACK: mocha runs tests in parellel, so we have to force ignoring of env variables line 73
hack // HACK: node 0.12.x appears to inject a slash at the front line 233
hack // HACK: http-proxy uses node's http.request().pipe(), which doesn't properly line 117