Travis build failure on IE 10 and Safari

[AdrianCozma]

The Travis builds for Safari and Internet Explorer 10 are failing with:

  2) WsClient echo.from.ws.server:
      AssertionError: '# This script is used for loading a browser origin page\n\naccept http://localhost:8080/\naccepted\nconnected\nread method "GET == '# This script is used for loading a browser origin page\n\naccept http://localhost:8080/\naccepted\nconnected\nread method "GET
      + expected - actual

       read method "GET"
       read version "HTTP/1.1"
       read header "Host" "localhost:8080"
      -read header "Upgrade" /(?i:websocket)/
      -# commented out as of now because bug: https://github.com/k3po/k3po/issues/53
      -# read header "Connection" /(?i:Upgrade)/
      -read header "Sec-WebSocket-Key" /(?<readKey>[a-zA-Z0-9+\/=]{24})/
      -read header "Sec-WebSocket-Version" "13"
      -
      -write status "101" "Switching Protocols"
      -write version "HTTP/1.1"
      -write header "Upgrade" "websocket"
      -write header "Connection" "Upgrade"
      -write header "Sec-WebSocket-Accept" ${ws:handshakeHash(readKey)}
      -write notify SERVER_READY_TO_READ
      -
      -read [0x81 0xfd] ([0..4] :readMask)
      -read option mask ${readMask}
      -read ([0..125] :server125)
      -read option mask [0x00 0x00 0x00 0x00]
      -read await CLIENT_READY_TO_READ
      -
      -write [0x81 0x7d] ${server125}
      +Missing HTTP header: Upgrade

      at assertResults (lib/testFrameworks/mocha-k3po.js:121:28)
      at Context.<anonymous> (lib/testFrameworks/mocha-k3po.js:173:21)
Warning: Task "mochaTest:testMochaK3poSauceBrowserSupport" failed.� Use --force to continue.
Aborted due to warnings.
The command "grunt sauceTest" exited with 3.

please find full logs here:

• IE 10
• Safari