Made use of queue support for SDL avoiding the callback approach which greatly simplifies the code and increases the APU accuracy.

It's stil glitchy and noisy, need to check the problems.

Still requires work to be able to be able to emulate APU together with the CPU instead of inverting the control.

This a very work in progress situation that requires stability.
The most important part is the fact that it's possible for an external entity (SDL) to call an audio tick and get a volume.

This reverts commit b7ce4b6a.

This makes it possible to run Boytacean in Ubuntu using dynamic linking with the native SDL libraries.

For wayland dynamic linking of SDL2 may be required.

This reverts commit b7ce4b6a.

This makes it possible to run Boytacean in Ubuntu using dynamic linking with the native SDL libraries.

For wayland dynamic linking of SDL2 may be required.

This reverts commit b7ce4b6a.

This makes it possible to run Boytacean in Ubuntu using dynamic linking with the native SDL libraries.

This allows for a much more fluid draw of frames using the `present_vsync()`.

Normalized handling of ticks in SDL according to the Web version implementation.

Created a series of new structures including the `PaletteInfo` one.

We still need to add more palettes from the Web frontend.

To avoid 0x0 characters in ROM title.

This reverts commit e252646f.