Don't compile tests file with babel

.gitignore

@@ -28,7 +28,6 @@ node_modules
 *.swp
 
 # GitBook with babel
-/packages/gitbook/lib
 /packages/gitbook-core/lib
 /packages/gitbook-plugin/lib
 

packages/gitbook/.gitignore

@@ -0,0 +1 @@
+lib

packages/gitbook/package.json

@@ -69,7 +69,7 @@
   },
   "scripts": {
     "test": "./node_modules/.bin/mocha ./testing/setup.js \"./src/**/*/__tests__/*.js\" --bail --reporter=list --timeout=10000 --compilers js:babel-register",
-    "dist": "rm -rf lib/ && babel -d lib/ src/",
+    "dist": "rm -rf lib/ && babel -d lib/ src/ --source-maps --ignore \"**/*/__tests__/*.js\"",
     "prepublish": "npm run dist"
   },
   "repository": {