Log Message:
Update to gipfel-0.3.1

gipfel-0.3.1
* Fix compile error and warnings on Linux.

gipfel-0.3.0
* Use exiv2 library for image metadata reading and writing.
  (initial patch by Konrad Golling).
* Make gipfel compile on [MinGW](http://www.mingw.org/)
* Check for files in local tarball to make gipfel work without
  installing it.
* Don't exit on Escape.