code: function append_to(config, obj) {
  		if(config === undefined) {
  			//console.warn('Warning: config internal append_to() called with undefined first argument!');
  			config = {};
  		} else if(! (config && (typeof config === 'object')) ) {
  			throw new TypeError("Attempt to append an object into " + (typeof config) + "!");
  		}
  		if(! (obj && (typeof obj === 'object')) ) {
  			 throw new TypeError("Attempt to append non-object (" + (typeof obj) + ")!");
  		}
  		Object.keys(obj).forEach(function(key) {
  			var new_value = obj[key];
  
  			// Arrays
  			if(new_value && (new_value instanceof Array)) {
  				if(config[key] && (config[key] instanceof Array)) {
  					config[key] = config[key].concat(new_value);
  				} else if(config[key] === undefined) {
  					config[key] = [].concat(new_value);
  				} else {
  					throw new TypeError("Attempt to append an array into " + (typeof config[key]) + "!");
  				}
  				return;
  			}
  
  			// Objects
  			if(new_value && (typeof new_value === 'object')) {
  				config[key] = append_to(config[key], new_value).config;
  				return;
  			}
  
  			// Other
  			config[key] = new_value;
  		});
  		return {"and": append_to.bind({}, config), "config":config};
  	}
docs: /* Append config file into config object