support for merges directory in wp8
[CB-4532] Changes the CLI to only use optimist for verbose and version
- Also adds limited unit tests for the CLI module
bb10 config.xml options fix

• only bb assets
• config.xml overwrite fix
• <gap:splash> rename to <rim:splash>
• <preference name="orientation"/> support [CB-4563]
• rim xmlns added
• <content src/> added [CB-4570]