Add an option to make slide rotate with player's sight

[SihenZhang]

Sometimes, I need to make the slide show in the sky as a sign mark. Just like below.

But in another view, the slide will be mirror-flipped.

So, I want to add an option in the Projecter which can make the slide rotate with the player's sight.

[FledgeXu]

Maybe we should enable culling here.

SlideShow/src/main/java/org/teacon/slides/ProjectorData.java

Line 63 in 48fdfb5

.cull(DISABLE_CULL)

And, draw the picture twice in here: one is clockwise and another is anticlockwise

SlideShow/src/main/java/org/teacon/slides/ProjectorRenderer.java

Line 38 in 48fdfb5

builder.pos(transforms, 0F, tile.currentSlide.height, -1F / 256F).color(red, green, blue, alpha).tex(0F, 1F).lightmap(combinedLight).endVertex();

These can avoid the mirror-flipped issue.