update extended branch: Merge branch 'feature/74' into extended

README.md

@@ -187,7 +187,7 @@ In following sample a person uses different systems, and group of persons which
 
 ```csharp
 @startuml
-!include https://raw.githubusercontent.com/plantuml-stdlib/C4-PlantUML/master/C4_Container.puml
+!include https://raw.githubusercontent.com/kirchsth/C4-PlantUML/extended/C4_Container.puml
 HIDE_STEREOTYPE()
 
 Person(a, "A")
@@ -214,7 +214,7 @@ Rel_L(x, s4, "uses")
 @enduml
 ```
 
-![Relation versus Layout](http://www.plantuml.com/plantuml/png/LSt1QeD04CRnkq-HvgJGA55FFQLLeGLBHIEq9rbrQ8HrbTrPshnzPmn5Svl_3_RRaq6XqOxIUHXK9sqFkmlYR9w2G8iV_tl0Yssj0TrD2a6XtqrZC4kX-Ct1O2-7DaZYGy5Kl-V1A0o29ceIUY461TgVUV_rBSsQwfoLsSVvgyXSpt4Aq6PIhdZSxP_ttd-sb2zhTfJ9cZrbkYPGPfHEBgvDpLEjjzmbtztjJldkRtVEDwoV_zB09mrKLuCmkkP8NHqt43A46uWOeWt43361Ku9iQfvSPgm1GyfOBXZUOxfWT8_vWl6A9r2z7UKV "Relation versus Layout")
+![Relation versus Layout](http://www.plantuml.com/plantuml/png/LSrHQxCm5CRnUpz5trufl5EgNksgcmeRE2PQORkIc1ocJ6D9JbZxxNTY6R5tv_yZF3bgP0hDF7d_Hiad8s0t89xrOnGfzXD-ZJYOtcXGV9484aE-pD7tgFYWSOYozA6QcCJshOpWWY052C8keyTibA32ivr-USsBhZaLTV5--gmAF_2y2fHUfC_-x_PF--0lUyfdbvmoSoaeSvT0ML1w9RjshPtgW_MkxSrlTsvlSRjBUuFx_4837pJGN3N2xEi3TNFOG6mXta1Y8Tb0QY4by6gOkjPEhZD6WoQrMAyOtsE-OdAFvOgfmoD8OURf5m00 "Relation versus Layout")
 
 ## Layout Options