v1.4.4

• forth: added u. unloop leave cell+ cells page key?
• forth: allow input of negative numbers
• forth: optimized cmove, cmove>
• forth: made . print signed numbers
• forth: various bugfixes
• doc: simplified & improved intro + tutorial, minor improvements
• vi: bugfix, exiting editor disabled key repeat

Thanks to Christian Johansson and polluks for bug reports!