Code reorganization
Remove 'C' prefix from types
Remove empty Node destructor
Clean up SourceTree combinators
Add defaultBuildPrefix function
Add missing include
Remove 'c' prefix from toolchain functions and add explicit export list
Add API function for retrieving audio block size
Base disk transfer size on audio block size

If the audio block size is large (e.g. when streaming), a fixed disk transfer
size might be too small.
Remove unused includes
Remove debug output