Add wallaby.js support, holy crap

package.json

@@ -31,6 +31,7 @@
     "lodash": "^3.0.0"
   },
   "devDependencies": {
+    "babel": "^5.8.21",
     "babel-core": "^5.5.0",
     "babel-eslint": "^4.0.5",
     "babel-loader": "^5.3.2",

wallaby.conf.js

@@ -0,0 +1,19 @@
+/*eslint-disable */
+var babel = require('babel');
+
+module.exports = function(wallaby) {
+  return {
+    files: [
+      'lib/**/*.js',
+    ],
+    tests: [
+      'test/**/*-spec.js',
+    ],
+    compilers: {
+      '**/*.js': wallaby.compilers.babel({babel: babel, stage: 1}),
+    },
+    env: {
+      type: 'node',
+    },
+  };
+};