add SauceLabs testing

package.json

@@ -50,12 +50,14 @@
     "gulp-bump": "^0.1.13",
     "gulp-rename": "^1.2.0",
     "gulp-uglify": "^1.1.0",
+    "http-server": "^0.8.5",
     "isparta": "^4.0.0",
     "json-loader": "^0.5.2",
     "json-schema-to-markdown-table": "^0.4.0",
     "mocha": "^2.1.0",
     "mocha-junit-reporter": "^1.9.1",
     "mocha-phantomjs": "^4.0.1",
+    "mocha-in-sauce": "^0.0.1",
     "null-loader": "^0.1.1",
     "webpack": "^1.5.3",
     "yargs": "^1.3.1"
@@ -74,7 +76,8 @@
     "coveralls": "cat ./coverage/lcov.info | coveralls",
     "lint": "if ! [ -f eslintrc ]; then curl -o eslintrc 'https://raw.githubusercontent.com/ripple/javascript-style-guide/es6/eslintrc'; echo 'parser: babel-eslint' >> eslintrc; fi; eslint -c eslintrc src/",
     "perf": "./scripts/perf_test.sh",
-    "start": "babel-node scripts/http.js"
+    "start": "babel-node scripts/http.js",
+    "sauce": "babel-node scripts/sauce-runner.js"
   },
   "repository": {
     "type": "git",