Log Message:
Update to 0.3.1: minor fixes.

release 0.3.1 (20130709)
   - Don't leak memory and assert if a bad command-line option comes
     after a -D or a -include foo.
   - Since imake is a principal application for tradcpp and imake carefully
     hides what it's doing when you run it, when rejecting an invalid option
     be sure to report *what* that option is.