Link external files as thoughts and their content into notes
Option to import external txt files (txt, rtf, html, xml, ...) into PB as thought automatically copies its content (or portion of it) inside notes panel.
If files are changed, content is updated on request or on thought selection.
Advantages:
1) files are left in their original folder structure, available for editing with other applications
2) by using relative links, external files can be 'ported' together brain file
3) user could navigate external files as thoughts linked to the other PB thoughts and immediately read the content (as snapshot or portion of it for quick navigation, then as full updated content after specific request)