@neobrain, could you confirm that this is correct?

It's been tested with various different games and fixes different textures, including in Animal Crossing, Kirby Triple Deluxe, and SMB3D.

nihstro: Update submodule to latest upstream/master to support MADI instruction decoding.

Also adds better documentation and removes the one-off reimplementation
of the function in pica.h.

Fixes some games crashing.

The background color can be seen at the sides of the bottom screen or when the window is wider than normal.

Pica/VertexShader: Fix a bug caused due to incorrect assumptions of consecutive output register tables.

We now write create a temporary buffer for output registers and copy all of them to the actual output vertex structure after the shader has run. This is technically not necessary, but it's easier to vectorize in the future.

This fixes the horizontal lines in Picross E, Cubic Ninja, Cave Story 3D and possibly others

Includes more opcodes to implement in the future.

- Centralizes color format encode/decode functions.
- Fixes endianness issues.
- Implements remaining framebuffer formats in the debugger.

This allows Virtual Console games to display properly.

Bit 3 is used to specify a raw copy, where no processing is done to the data, seems to behave exactly as a DMA.
Bit 1 is used to specify whether to convert from a tiled format to a linear format or viceversa.

It was trying to take the LSB from `coarse_x`, which would always be 0
and thus would always return the same texel from each byte. To add
insult to the injury, the conditional was actually the wrong way around
too.

Fixes blocky text in OoT.

This was caused during morton decoding by me not masking the bits of
each coordinate before merging them, so the bits from x could set bits
in y if it was >255.

- Fixes a regression with #594.

Previously it wouldn't jump back to the start of the loop code once it reached the end of the block.
Fixes the texture problems in a lot of games.

Redeclaring the variable inside the switch was causing weird behavior.