Document code

[the-crazyball]

Proper documentation for all the code. At the moment it's not really easy to follow what each function, object, types, modules, classes, etc... does. Use JSDoc formatting. Example:

/**
 * [someFunction description]
 * @param  {[type]} arg1 [description]
 * @param  {[type]} arg2 [description]
 * @return {[type]}      [description]
 */
const someFunction = function (arg1, arg2) {
	// Do something...
};

Additional useful tags like @todo, @deprecated, @license, and so on can be used.