This commit has been reported to cause distortions in phoneme
pitches and speeds.

This is from the old espeak RiscOS port that has been removed.

If/when the espeak-ng program is ported to RiscOS, this will be
done in a different, more maintainable way.

The debugging code is done inconsistently, mainly to trace the
event and audio output logic. This makes it harder to understand
the code flow for logic that is not enabled by default.

As such the debugging code makes the code harder to maintain.

Also use size_t instead of int in some places
where it make sense

This allows newer versions of sonic to be used and to keep
up-to-date with bug fixes provided by the system.

This was part of espeakedit, and used wxWidgets to draw the
envelope graphs.

This removes the implementation of those functions from espeak-ng
and use the versions in libespeak-ng.

NOTE: This is needed to cross-compile to Windows.

This creates an fread compatible API on wxInputStream objects and
uses that API in LoadSpectSeq. This is to help the transition from
the wxWidgets wxInputStream API to the C FILE API.