Renamed bundle 'org.eclipse.smarthome.core.component' to 'org.eclipse.smarthome.core.thing'.
Added javadoc to public classes and interfaces.

Signed-off-by: Dennis Nobel <d.nobel@external.telekom.de>
Renamed handler factories in sample and added javadoc.

Signed-off-by: Dennis Nobel <d.nobel@external.telekom.de>