Added a way to override the settings file without changing it.

It's more branch-friendly.
Removed the unused mainPageTitle property from the settings file.
Changed the home page to be specified (only) in the settings file.
Added basic sidebar items/urls for CUSD.

Still need images/icons and an "about" page
Modified the Jockeyjs lib to send the current web view with each asynchronous event it receives.
Added the ability to receive alerts from the jockey.alerts.js javascript lib.
Revert "Added basic sidebar items/urls for CUSD."

This reverts commit 8ea9a86d1ab3559de5b49e13ea4fc09719347746.
Made the jockeyjs domains configurable.
Fixed the JockeyJS listener to anticipate that the initial page might not have a URL yet.