Add test for issue 755

[astippich]

see #755 and #810

[piponazo]

Thanks! As discussed, we will merge this when we think about a way to contribute big files.

[clanmills]

I used to keep big files (video and EPS) in SVN and pull them down "on demand". In bash, it's something like:

if [ ! -e test/data/foo ]; then
    svn export svn://..../test/data/foo
fi
if [ ! -e test/data/foo ]; then
   >&2 echo 'unable to find test/data/foo'
   exit 1
fi

Or, you could keep big files on exiv2.org and fetch them on demand from python.

CMake can also get files from http: URLs. I believe Gilles uses this to test big files with DigiKam.

[clanmills]

We should improve the python test suite for v1.00. #1550. That effort should include "deep" testing to deal with large files which are not in the repos and are downloaded when required.