initial commit
well - it works pretty well, but still some fancy bugs
some bugs fixed, function products still wrong
last state before separating parser class
about to re-work unary operators
about to re-work extractNumber workaround
about to remove old "e" support
version 0.3 - everything may work
shell interface finished
version 0.5 - shell bugfixes, help and test mode introduced
help output improved, pos1/end keys, little bugfixes
error handling improved, additional function writeouts, sin(n*pi) is
really zero
sqrt, ans, abs added, additional test/help corresponding
version 0.6
terminal fixed
debug stuff removed, version 0.6b
debug stuff REALLY removed
version 0.6c
fixed help info width
fixed tan absolute zero or inf