update README and cleanup early drafts

Author: DO1JLR

README.md

@@ -5,6 +5,10 @@ Designentwurf eines Patch für den THW OV Friedrichshafen.
 ![Path #1B](thw_patch_1b.svg)
 ![Path #2A](thw_patch_2a.svg)
 ![Path #2B](thw_patch_2b.svg)
+![Path #3A](thw_patch_3a.svg)
+![Path #3B](thw_patch_3b.svg)
+![Path #4A](thw_patch_4a.svg)
+![Path #4B](thw_patch_4b.svg)
 
 # Lizenz:
 [CC-BY-3.0](https://creativecommons.org/licenses/by/3.0/de/)