XNAT-4210: Site Setup page works as requested (initialized:true) is set before showing the confirmation dialog, also moved site setup functions to /scripts/xnat/app/siteSetup.js; XNAT-4192: session timer works on all pages and DOESN'T RELY ON YUI ANYMORE; more reliable lookup of Spawner™ widget methods; added hooks in form input widgets to lookup a value via AJAX using syntax: 'value: ?$ /path/to/data | prop.name';

Site setup sets initialized:true before closing the modal dialog; site setup functions moved to /scripts/xnat/app/siteSetup.js; more reliable Spawner widget method lookup - won't freak out if it can't find a method for your widget; session timer works on JSP pages and, get this... DOESN'T USE YUI ANYMORE; enhancements to xmodal dialogs - add 'keep' class to prevent destruction of modal elements when triggering a .close; probably some other stuff...

Removed old version REST API, added new buildInfo call in siteConfig, added build plugin to retrieve git repo info and build number.

integrate gradle-xnat-plugin and work out configuration for Cargo deploy
tasks.