Add npm/browserify/webpack support without requiring globals etc.

[maxkfranz]

This adds support to qTip2 for use with npm+browserify or npm+webpack. With this change, you can now do this:

let registerQtip = require('qtip2');
let jQuery = require('jquery');

registerQtip( jQuery );

// now i can do jQuery('#foo').qtip(...)

This gives the dev control over when registration happens and it removes the need for globals.

Previously, you'd have to do this:

window.$ = window.jQuery = require('jquery');
require('qtip2');

This also makes it better when using qTip2 with tools like Cytoscape.js:

let cytoscape = require('cytoscape');
let registerQtip = require('qtip2');
let jquery = require('jquery');
let registerCyQtip = require('cytoscape-qtip');

registerQtip( jquery );
registerCyQtip( cytoscape, jquery );

References:

• http://stackoverflow.com/questions/40660643/how-to-include-cytoscape-js-extension-cytoscape-qtip-into-an-ember-app
• Publish as npm module #755
• jQuery not found when using Browserify + NPM #799

If you have any questions or any concerns, please let me know.

Thanks

[Kurtas]

Do you plan merge?

[ajoslin103]

can we get a merge on this?

[ssmereka]

Can we please get a merge on this?

[tomasomaso]

Can we please get a merge on this?