* libgphoto2/gphoto2-file.[c,h]: Implement progress reporting here.
That makes file upload and file download cancellable.
* frontends/command-line/main.c: Use file-specific progress reporting.
git-svn-id: https://svn.code.sf.net/p/gphoto/code/trunk/libgphoto2@3600 67ed7778-7388-44ab-90cf-0a291f65f57c