Detect when compositor client was disconnected

Open-webOS-DCO-1.0-Signed-off-by: Simon Busch <morphis@gravedo.de>
Add .gitignore file

Signed-off-by: Simon Busch <morphis@gravedo.de>
Add missing links to build include directories to build configuration

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