Provide option to include PlantUML diagrams at arbitrary positions in doc

[MShekow]

At the moment the user is forced to either have all PlantUML images at the very top of a page, or at the very bottom (option diagramsOnTop).

But what if I want to be able to freely distribute the diagrams on the page? E.g. what if I want to have an introduction headline and paragraph, followed by diagram number 1, then some more text, then diagram number 2, etc.

Since I can simply include images myself using the syntax ![diagram](diagram.svg) the easiest solution would probably to have a CLI argument that disables the automatic inclusion of the converted puml files.