[Bug Fix] It should not modify the size of resource without dpi parameter
Merge branch 'master' of github.com:benlau/quickandroid into DEV
Drawable.qml : Added "fillMode" property for image resource.
MaterialShadow : It will use image instead of shadow by default
Replaced the shadow image for depth 4 and 5 by a darker version.
Merge pull request #5 from benlau/DEV

Performance improvement for material shadow and bug fixes