Upgrading Primefaces to 3.5 (refer Issue #17)

Updating booking-faces sample primefaces version to 3.5 results into Arithmetic divide by zero error. Datatable dynamic=true is replaced by lazy=true helps to go pass that error. Next java.lang.NullPointerException get thrown at org.primefaces.renderkit.CoreRenderer.getWidgetBuilder.

This pull request resolve Issue #17.