Updates on MCCustomPrinter methods
Merge branch 'refactor-syntax_unicode_CustomPrinter' of https://github.com/runrevpanos/livecode into refactor-syntax_unicode_custom_printer
[[ UnicodifyPrinter ]] Ensured printer settings is of MCDataRef type.
[[ UnicodifyPrinter ]] Various tweaks to make sure it compiles and runs on Mac.