Improved Selectize demo
Improved Selectize demo

* Loads jQuery & Selectize on demand
* Button to turn Selectize on that gets disabled when all it loaded
* Helper function added to load scripts

ZECTBynmo/json-editor,abe1001/json-editor,grokify/json-editor,cunneen/json-editor,ZECTBynmo/json-editor,abe1001/json-editor,jdorn/json-editor,rmulder/json-editor,LACabeza/json-editor,abop/json-editor,juazugas/json-editor,JJediny/json-editor,YousefED/json-editor,jdorn/json-editor,rmulder/json-editor,niebert/json-editor,grokify/json-editor,azavea/json-editor,azavea/json-editor,YousefED/json-editor,JJediny/json-editor,cunneen/json-editor,LACabeza/json-editor,JJediny/json-editor,juazugas/json-editor,flibbertigibbet/json-editor,flibbertigibbet/json-editor,abop/json-editor,niebert/json-editor