Recommendation is to avoid using the year nomenclature as this
information is already encoded in the git repo. Avoids needing to
repeatly update.
Also updates AUTHORS.txt from current repo with contributor names
A few files snuck in with CRLF for the line endings. These make it hard
to look at diffs as every line appears to have changed. This commit
makes only line ending changes, so can be ignored
Normal SetValue() call would temporarily change the displayed
value, but as soon as the text widget receives focus again, the original
expression (not evaluated) is restored.
To avoid this, the original expression is cleared in the associated
NumericEvaluator object.
