[jaring] lib.Jaring: check numeric value when encoding json.
[jaring] main: load global application script.
[jaring] db/init.sqlite.sql: use contraint syntax.
[jaring] js.Jaring-all: various enhancement.

* js.jx.GridPaging: add config to enable/disable paging bar.
* js.jx.CardGridFrom:
  - fix create store.
  - include in Jaring-all.js.
* js.jx.ImportButton: include in Jaring-all.js.
[jaring] Reorder javascript loading.
[jaring] Set Ext.Loader default properties.
[jaring] lib.Jaring: filter read request using GET parameters.
[jaring] lib.Jaring: remove debug.