Log Message:
Update to version 1.3. 
Changes:
- Added a "--cpp" option for drop-in compatibility with standard cpp.
  It causes cpphs to accept standard cpp flags and translate them to
  cpphs equivalents. Compatibility options include: -o, -ansi, -traditional, 
  -stdc, -x, -include, -P, -C, -CC, -A. The file behaviour is different 
  too - if two filenames are given on the commandline, then the second is
  treated as the output location.
- Fixed a corner-case bug in evaluating chained and overlapping #ifdefs.