The path to JQuery is wrong. Create an empty widget from the boilerplate and compare the references to jQuery. Mind that it is case-sensitive on the server, but not local.
You can not use minified code.
Replace the dots in the datatables file name with underscores except for the .js
I recommend you look at the DataTables widget in the app store for inspiration and perhaps a head start on whatever you’re doing. There’s a demo project for DataTables in the app store too.