Adding config file for unit tests

package.json

@@ -12,7 +12,7 @@
   "bugs": "https://github.com/kitematic/kitematic/issues",
   "scripts": {
     "start": "gulp",
-    "test": "jest",
+    "test": "jest -c jest-unit.json",
     "integration": "jest -c jest-integration.json",
     "release": "gulp release",
     "release:beta": "gulp release --beta",
@@ -25,24 +25,6 @@
       "url": "http://www.apache.org/licenses/LICENSE-2.0.html"
     }
   ],
-  "jest": {
-    "scriptPreprocessor": "<rootDir>/util/preprocessor.js",
-    "setupEnvScriptFile": "<rootDir>/util/testenv.js",
-    "setupTestFrameworkScriptFile": "<rootDir>/util/prepare.js",
-    "unmockedModulePathPatterns": [
-      "alt",
-      "stream",
-      "tty",
-      "net",
-      "crypto",
-      "babel",
-      "<rootDir>/node_modules/.*JSONStream",
-      "<rootDir>/node_modules/object-assign",
-      "<rootDir>/node_modules/underscore",
-      "<rootDir>/node_modules/bluebird",
-      "<rootDir>/node_modules/source-map-support"
-    ]
-  },
   "docker-version": "1.6.2",
   "docker-machine-version": "0.2.0",
   "electron-version": "0.26.0",