Change config after load defaultConfigs

[dgmike]

Its not possible join configurations on will.js, so, its better have a way to do it.

Solving problem with above code. Its not the best way but solves for time.

will.use(["will.js"])(function(status) {
  will.configure(function(config) {
    config.addDomain("newlocation", "/assets/components", "js");
  });
});

[kawamanza]

Hi Mike,

I made these changes on the commit 6f88b17, adding a new method postConfigure. With this new method you can keep the default configuration and add some post-load configuration to be appended.

Please see the spec to check the behavior of this before I generate a new release.