Beautify license/module header comment

[Tyriar]

@parisk how about we change this:

/**
 * xterm.js: xterm, in the browser
 * Copyright (c) 2016, SourceLair Private Company <www.sourcelair.com> (MIT License)
 */

/**
 * Generic utilities module. This module contains generic methods that can be helpful at
 * different parts of the code base.
 * @module xterm/utils/Generic
 */

To this:

/**
 * @license
 * xterm.js: xterm, in the browser
 * Copyright (c) 2016, SourceLair Private Company <www.sourcelair.com> (MIT License)
 *
 * @module xterm/utils/Generic
 * Generic utilities module. This module contains generic methods that can be helpful at
 * different parts of the code base.
 */

Looks a lot nicer imo.

[parisk]

Yep, it is indeed. Assigning this to myself and adding this to the next milestone.