Use prebuilt binaries for bufferutil and utf-8-validate

"ws" module requires bufferutil and utf-8-validate modules, which have to be build during installation. On Windows this requires Python, Visual Studio 2010, etc. Prebuilt the two modules and use them from Telerik forks.

Author: rosen-vladimirov

package.json

@@ -28,6 +28,7 @@
     "broccoli": "0.16.2",
     "broccoli-funnel": "0.2.3",
     "bufferpack": "0.0.6",
+    "bufferutil": "https://github.com/telerik/bufferutil/tarball/master",
     "byline": "4.1.1",
     "chalk": "1.0.0",
     "cli-table": "https://github.com/telerik/cli-table/tarball/master",
@@ -64,6 +65,7 @@
     "shelljs": "0.3.0",
     "tabtab": "https://github.com/Icenium/node-tabtab/tarball/master",
     "temp": "0.8.1",
+    "utf-8-validate": "https://github.com/telerik/utf-8-validate/tarball/master",
     "winreg": "0.0.12",
     "ws": "0.7.1",
     "xcode": "https://github.com/NativeScript/node-xcode/archive/NativeScript-0.9.tar.gz",