Add content methods as properties of `this` inside of content

[twolfson]

How practical would it be to have this also access the content properties?

The repercussions would require a default value system which means cleaning up the batch context as discussed in #5

The benefit would be doing something like:

'addParam': function (name, val) {
  this.params[name] = val;
},
'when converted from left to right': function () {
  this.addParam('layout', 'left-right');
}

For default base contexts, we might do something like:

'*': { // or 'default' or some other special key
  this.params = {};
}

[twolfson]

A few months later and I still think this is a great idea. I am not sure why I wanted a default base context, that seems like overkill.

[twolfson]

By default, expose the methods as before functions. As properties of those methods, we have before, after, beforeEach, afterEach methods which are .bind(suite.ctx).