Better Exec line in the desktop file

%u means that ephoto accept a single url as param

Whitout this filemanagers (nemo at least) never list ephoto
as a suggested default for your files and you cannot
set it as your default viewer.

data/desktop/ephoto.desktop

@@ -29,7 +29,7 @@ Comment[ru]=Просмотр фото
 Comment[sr]=Просвећени прегледник слика
 Comment[tr]=Fotoğraf görüntüleyici
 Icon=ephoto
-Exec=ephoto
+Exec=ephoto %u
 Terminal=false
 MimeType=inode/directory;image/png;image/jpeg;image/pjpeg;image/x-xpixmap;image/tiff;image/svg+xml;image/svg+xml-compressed;image/gif;image/x-portable-anymap;image/x-portable-bitmap;image/x-portable-graymap;image/x-portable-pixmap;image/bmp;image/x-bmp;image/x-tga;image/vnd.wap.wbmp;image/webp;image/vnd.microsoft.icon;image/ico;image/x-ico;image/x-win-bitmap;image/vnd.adobe.photoshop;image/x-psd;application/pdf;application/x-pdf;image/pdf;application/postscript;image/x-xcf;image/x-compressed-xcf;
 Categories=Graphics;Viewer;