jquery replaced with v3.7.1 and supporting files updated

[croaker000]

This patch updates Fuel to run JQuery v3.x and the latest/last open source release of CKEditor 4.x, in this release it's v3.7.1 and v4.22 respectively.

Native Fuel js code has been updated to correct deprications and retired methods. Notably, jquery.formbuilder.js, which used to use sub() and now doesn't.

Many of the ./js/jquery/plugins are significantly old and in some case unsupported. All these have been reviewed. They have had their versions updated where possible and/or have been edited to become v3.x compatible. In most cases, these plugins are now orphaned from their original sources.