Cards: add a simple shadow

Signed-off-by: Christophe Chapuis <chris.chapuis@gmail.com>
Stub tests: implement a fake "palm://com.palm.applicationManager/getAppInfo" answer

Signed-off-by: Christophe Chapuis <chris.chapuis@gmail.com>
Merge pull request #62 from webOS-ports/tofe/work

Tofe/work: simple card shadow