Create a foreground activity for every application

Signed-off-by: Simon Busch <morphis@gravedo.de>
Add stub method for property retrieval from PalmSystem

Signed-off-by: Simon Busch <morphis@gravedo.de>
Remove debugging output from plugin manager

Signed-off-by: Simon Busch <morphis@gravedo.de>
Validate wether parameters were supplied before processing them

Signed-off-by: Simon Busch <morphis@gravedo.de>
Add support for PalmSystem.stageReady/stagePending

Signed-off-by: Simon Busch <morphis@gravedo.de>