Slide Show Pro

New:

• images displayed by the projector can now change XYZ angles.
• a projector can now have multiple screens, which always display the same image, but their positions, angles, and sizes are independent.
• add a server-side config file to control permissions for some behaviors.

Fix:

• webp image decoding bug, also optimized its performance.
• fix a image rendering bug: in certain view, images will not be rendered as expected.
• other slight bugs