…ave a built-in LED. Fixes #758
Fix the line number font rendering problem on the Mac. Now, the TextAreaLineNumbers class extends the TextAreaPainter and just overloads the paintLine method to make it render the line number instead of rendering the whole line. Other than that, the superclass' drawing code is used. So: the same drawing code that renders the source code text in the editor is now also being used to render the line numbers.
…lose/destructed objects #814
Updated constructor and dependent code, other minor fixes. Robot LCD examples all compile, but not yet tested against actual hardware.