v1.28

• Improved documentation, describe demos and fix some
  error in tutorial.
• Bugfixed some demos.

v1.27

• "forget" did not handle missing word
• factor "more" to separate word
• improve seeing of do..loop

v1.26

• Improved line buffering, removed "linebuf"
• Added assembler labels
• Added "base", "hex", "decimal"
• Renamed "exec" => "execute"
• Added "[char]"
• Added some support for floating point values (float.fs)
• Removed "?immed"
• Made "words" pause when screen is full
• Added "lshift", "rshift"
• Added demo how to modify character ROM
• Optimizations, bugfixes, more documentation

v1.25

• math: added um/mod, */, */mod
• loops: added do, loop, +loop, i, j
• interpreter: make key up recall previous line entered
• bugfixed r@
• dropped "not" word - replaced by 0=
• rearranged zeropage usage so that parameter stack is a bit bigger
• documented layout of forth words
• bugfixed docs: invert, not "not", flips all bits
• added "bl" word (for space)