Remove wxWidgets from audio code

[generic-pers0n]

Pursuant to moving to Qt, it is a good idea to make our audio code toolkit neutral. Some of this work has already started in AudioIO and RealtimeEffectManager at the time of initially writing this issue.

This issue isn't just pursuant to moving to Qt, however. This is also pursuant to moving Saucedacity's audio processing code into a separate library, perhaps called "SauceAudio" or something. SauceAudio should not have any dependencies on wxWidgets whatsoever.

Finally, in regards to Saucedacity 1.2: some parts might be complete before Saucedacity 1.2 stable is released, but not as a whole. On the other hand, SauceAudio will not make it for Saucedacity 1.2. It is currently planned that work be started on SauceAudio for Saucedacity 1.3 development.

[FrostKnight]

I agree with this wisdom, in many ways. Being toolkit neutral sounds very awesome... :)

I am not sure which toolkit would be best, for minimalism and still have gui and be stable, but either way, so far so good!