Updateing Licensing information in the library

[Kiril Gruncharov]

Hi there A few days ago I discoved hint.css and stared using it for my company project. First in the source files here and here and in all the files in the src forlder they say:

/**
 * HINT.css is a tooltip library made in pure CSS.
 *
 * Source: https://github.com/chinchang/hint.css
 * Demo: http://kushagragour.in/lab/hint/
 *
 * Release under The MIT License
 *
 */

Please update your licensing information in the soruce files because I have found it early today but someone that have a lot of dependencies for their project might find it too late.

Edit: I see that in issue #153 it is clarifyed about the license but please update you files.

[Kushagra Gour]

Ahh. Missed there. Thanks for pointing. Will fix.