plugins: common: add support to scale lengths and font sizes per grid unit

Signed-off-by: Simon Busch <morphis@gravedo.de>
Merge pull request #72 from webOS-ports/morphis/gridunit

plugins: common: add support to scale lengths and font sizes per grid un...
Add a notification management QML plugin

Signed-off-by: Simon Busch <morphis@gravedo.de>
Merge pull request #73 from webOS-ports/tofe/notifications

Add a notification management QML plugin
plugins: common: expose application id for luna service message

Signed-off-by: Simon Busch <morphis@gravedo.de>
plugins: shell: notifications: expose more notification management functionality

Signed-off-by: Simon Busch <morphis@gravedo.de>
Handle quit signal from QML engine

Signed-off-by: Simon Busch <morphis@gravedo.de>
plugins: compositor: put screenshots into /media/internal/screencaptures

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