Combine jQuery framework files to reduce HTTP requests.

It's silly to use three http requests to load the basic jQuery framework files. Just combine them and load with a single request. So there are four possibilities:
- jquery.js - just jQuery
- jquery-noconflict.js - jQuery + no conflict
- jquery-migrate.js - jQuery + migrate
- jquery-noconflict-migrate.js - jQuery + no conflict + migrate (usually this is used)

Each of them also has a minified version. Depending on the options passed, one of these files will be chosen and only it will be loaded. No need to load three files.