====== Class ======
An abstraction to creating Java-like classes in JavaScript.
<code javascript>
var livingThings = Karma.Class({
  constructor: function() {},

  getAge: function() {
    return this.age;
  }
});

var Animal = Karma.Class({
  constructor: function(species, age){
    this.species = species;
    this.age = age;
  },

  getSpecies: function() {
    return this.species;
  }  
});

Animal.inherit(livingThings);

var bear = new Animal('bear', 10);
bear.getSpecies(); // 'bear'
bear.getAge(); // 10

Animal.add({
  modifyAge: function(age) { this.age = age; }
});

bear.modifyAge(20); 
bear.getAge(); // 20
</code>