This change allows selecting the audio backend to use in your compiler
programs. The selection can be made via the 'Compiler Settings' dialog
in the IDE (renamed from the 'C++ Compiler Settings' dialog).
The new miniaudio backend is the default, a checkbox for "Use old audio
backend" exists in the IDE for switching back to the old backend (in the
event someone runs into compatibility issues or etc.). Eventually we'll
drop the old one.
- No longer constantly (over)writes files in the `internal\temp` folder while typing in the IDE, as the generated C/C++ code is buffered internally now.
- Buffers are automatically written out to disk on a `Make` request (F5/F11).
- checks all remaining occurrences of the term 'qb64', some remain untouched, some are renamed according to context
- also added new logo for README.md
- this step does finalize the 'Phoenix Edition' re-branding
