Custom Callback Handlers

The file and techniques outlined in js/Custom.js are all still applicable. However, all the routines have been placed into the "hwc" namespace.

At a high level, all the routines have been wrapped in the "hwc" object (using JavaScript Immediately-Invoked Function Expression, or IIFE). Then the changes from Workflow to HybridApp have been applied. Function names have been retained except:
Old Global API New API
customBeforeWorkflowLoad() hwc.customBeforeHybridAppLoad()
customAfterWorkflowLoad() hwc.customAfterHybridAppLoad()
customBeforeProcessWorkflowMessage() hwc.customBeforeProcessDataMessage()
customAfterProcessWorkflowMessage() hwc.customAfterProcessDataMessage()