Initial version of classes cache and associated supporting structures. The cache logic is run in a separate thread from the UI to ensure responsiveness.

Very much a prototype at this point.

Initial implementation of object type cache. Added the name of the type as an example to UI.

Signed-off-by: Juha Lepola <juha.lepola@gmail.com>

Fixed the cleanup of HostCore thread. Was using terminate when quit should have been used. Also added some debug messages to MfwsRest class to verify that they do get destroyed.