Fixed up sidr menu. Drop shadow added to main content area.

Signed-off-by: Stanley Lai <stanleylai.sg@gmail.com>
Updated advisory page to reflect sidr menu. SIdr script modded to shift action bar as well when revealing menu.

Signed-off-by: Stanley Lai <stanleylai.sg@gmail.com>
Main page updated to reflect new sidr menu and code formatting.

Signed-off-by: Stanley Lai <stanleylai.sg@gmail.com>