Update Readme to point to the right images

@@ -8,7 +8,7 @@ This library is divided in two parts:
 It can create a full multi-pages document with graphics,
 It can create a full multi-pages document with graphics,
 images and text using TrueType fonts. With the ease of use you already know.
 images and text using TrueType fonts. With the ease of use you already know.
 
 
-![Example document](example.jpg)
+<img alt="Example document" src="https://raw.githubusercontent.com/DavBfr/dart_pdf/master/pdf/example.jpg">
 
 
 > Use the `printing` package <https://pub.dartlang.org/packages/printing>
 > Use the `printing` package <https://pub.dartlang.org/packages/printing>
 > for full flutter print and share operation.
 > for full flutter print and share operation.

@@ -5,7 +5,7 @@ documents to android or ios compatible printers
 
 
 See the example on how to use the plugin.
 See the example on how to use the plugin.
 
 
-<img alt="Example document" src="example.png" width="300">
+<img alt="Example document" src="https://raw.githubusercontent.com/DavBfr/dart_pdf/master/printing/example.png" width="300">
 
 
 > This plugin uses the `pdf` package <https://pub.dartlang.org/packages/pdf>
 > This plugin uses the `pdf` package <https://pub.dartlang.org/packages/pdf>
 > for pdf creation. Please refer to <https://pub.dartlang.org/documentation/pdf/latest/>
 > for pdf creation. Please refer to <https://pub.dartlang.org/documentation/pdf/latest/>