updated index.md with new pictures

Author: mikepdiy

docs/index.md

@@ -1,11 +1,13 @@
 ## Welcome to the MacroKB web resources page
 
-![Overall image](/images/Kb-github.png)
+![Presentation image](images/presentation.jpg)
 
 The user manual can be found  [here](manual.md).
 
 More details are present in the Github repository [here](https://github.com/mikepdiy/Macro-Keyboard-with-Encoders/)
 
+![Manufacturing image](images/manufacturing.jpg)
+