0.9.12

• Change the default Python directory from ~/python to ~/mu_code.
• Add instructions for installing PyQt5 and QScintilla on Mac OS.
• Update to latest version of uFlash.
• Add highlighting of search matches.
• Check if the script produced is > 8k.
• Use a settings file local to the Mu executable if available.
• Fix bug with highlighting code errors in Windows.
• Check to overwrite an existing file on the micro:bit FS.
• Start changelog