[NuevaVenta] Cambio de metodo para buscar articulos por codigo
Merge branch 'develop' of https://github.com/jotaemepereira/PIS-GR4-2014 into develop

Conflicts:
	sources/Prototipos/Java/DUSA/WebContent/JS/nuevaVenta.js
	sources/Prototipos/Java/DUSA/src/beans/VentaBean.java