Release 6.70 of SCC dated 2017-10-17

One primary change is to add -e option to replace comments with empty comments, either /* */ or // (with nothing after it except the newline). This makes some forms of analysis easier (and also means there isn't trailing blanks in the output unless there were trailing blanks in the input.

The other primary change affects the output from -c (print comments instead of code); newlines are preserved in appropriate locations, so that comments on separate lines are printed on separate lines. This makes the output easier to read.

One minor change is that the 'feature' names were changed and made more systematic.