Add source maps to the repo

[warpech]

As pointed in #1009, Chrome Developer Tools show 404 (Not Found) error message about missing source maps:

.../jquery-handsontable/lib/jquery-1.10.2.min.map
.../jquery-handsontable/dist/json-patch-duplex.js.map

As solution I propose to add missing source maps and files to which they link (without altering the files that contain the source map reference)

I'd rather keep the source maps, because this is also what jQuery does in their minified, production-ready files: http://jquery.com/download/

This issue only affects Chrome users with "Enable source maps" option enabled in the Developer Tools.

[jdivock]

Just chiming in that I'm experiencing this as well

[psmolenski]

I've added the missing source maps, however, now there has to be a json-patch-duplex.ts file in the dist directory and I looks kind of messy. Maybe we should leave only jQuery source map?