SwitcherCallback definition.
Empty BBSwitcherCallback files.
Move BBSwitcherCallback to its own files.
Callback constructor and destructor.
Headers and forward declarations.
Boilerplate IBMDSwitcherCallback event methods.
Switcher callback creation and deletion.
Whitespace fix.
Handle switcher disconnected.
Handle a switcher disconnect.

Merge branch 'monitor-disconnect'