implemented support for multiple statement lines

added check for colon token statement separator after processing a
command to getCommands(), which deletes the colon token and sets new
colon sub-code in the last token added to the rpn output list; added
end statement flag to colon code in table; added support for new colon
sub-colon to token text() function; added new translator test #16 with
various colon tests including errors (old translator segfaults on this
test)