UPDATE: split the webapp in a widget and the app itself

This splits the webapp in:

* IronCalc (the widget to be published on npmjs)
* The frontend for our "service"
* Adds "dummy code" for the backend using sqlite

webapp/app.ironcalc.com/server/init_db.sql

@@ -0,0 +1 @@
+CREATE TABLE models (hash TEXT, bytes BLOB);