Update .npmignore

I have babel running through some dependencies and ui-scroll causing 
```
Module build failed: Error: Couldn't find preset "env" relative to directory "..."
```

Removing the .babelrc from node_modules/angular-ui-scroll fixed my issue.

Author: zaucy

.npmignore

@@ -2,10 +2,11 @@
 /src
 /temp
 /test
+.babelrc
 .gitignore
 .jshintrc
 .npmignore
 .travis.yml
 bower.json
 Gruntfile.js
-webpack.config.js
+webpack.config.js