merge latest alles / AMY / tulip

[bwhitman]

Alles, AMY & Tulip are three separate projects. I made a chart !

But we've made a lot of changes to the Amy in Tulip (stereo, reverb, chorus, IDF5.X) that aren't in AMY or Alles. We should figure out how to bring these all together. I imagine we can ship AMY in Alles and Tulip as submodules. We should back port as much as possible to AMY from Tulip and then treat Alles and Tulip as AMY "clients" (note that Tulip also does Alles-y things.)

• [x] do IDF5 porting for Alles
• [x] get AMY running with chorus / reverb in amy-example
• [x] ifdefs for stereo, reverb, chorus
• [ ] see free RAM on Alles and maybe add them in
• [x] make AMY a submodule for Alles
• [x] make AMY a submodule for Tulip

[bwhitman]

This merge is complete! I'm going to track the reverb/chorus on Alles as a separate issue