RAXAJSS-384 Reorganized screener code layout

Now matches how sencha build tool lays out the app. uses app.json to load. allows "sencha build" commands to work

no build -> works normally. 
http://localhost/Raxa-JSS/src/screener

testing -> builds successfully, i18n errors. 
http://localhost/Raxa-JSS/src/screener/build/testing

package -> builds successfully, i18n errors. 
http://localhost/Raxa-JSS/src/screener/build/package

production -> builds successfully, but fails to launch. 
http://localhost/Raxa-JSS/src/screener/build/production

TODO: 
- Right now, it's basically re-copying all of sdk (sencha touch lib, etc) into screener folder. would like to abstract this elsewhere if possible (esp if we want screener, opd, others to all use 1 copy of same libraries)
- cleanup