- Reverted exifprint idx display

- Fixed/enhanced ExifParser::encode
- Added API ExifData::erase(beg, end)
- Enhanced logic to find matching tags in non-intrusive writing
- Disabled sorting of IFD entries when writing makernote IFDs

samples/exifprint.cpp

@@ -28,9 +28,7 @@ try {
     }
     Exiv2::ExifData::const_iterator end = exifData.end();
     for (Exiv2::ExifData::const_iterator i = exifData.begin(); i != end; ++i) {
-        std::cout << std::setw(3) << std::right
-                  << i->idx() << " "
-                  << std::setw(44) << std::setfill(' ') << std::left
+        std::cout << std::setw(44) << std::setfill(' ') << std::left
                   << i->key() << " "
                   << "0x" << std::setw(4) << std::setfill('0') << std::right
                   << std::hex << i->tag() << " "