Avoid renaming object properties in Closure compiler

[OndraM]

In #113 we added getter for the config values.

However, it does not work properly. The reason is the minified version in dist/ has the properties renamed, so the _config object actually looks something like this:

{
  g: "en", 
  l: null, 
  u: true, 
  i: "cc_cookie",
  v: 365,
  …
}

So calls like cc.getConfig('current_lang') obviously won't work, because the property was renamed to g.

The reason is Closure compiler optimization. One option to avoid this is to have keys of the object quoted, see StackOverflow. Keys would then be preserved from the optimalization.

Another option would be to not use ADVANCED_OPTIMIZATIONS level on Closure and use just SIMPLE_OPTIMIZATIONS. However it would mean a little bit bigger output file.

[orestbida]

This is what happens when no tests are set up!