How can I use this javafx library? - eclipse

I am trying to design gui on java.
I will use this javafx library https://github.com/HanSolo/Medusa
I downloaded this lib but how can I used it?
I added external jar on my javafx project but I can not make any sample code work.
I'm working with eclipse neon and java 8. By the way I set up javafx. It is okay.
Do I need anything else for using this library?
I have gradle and maven plug-in my eclipse IDE.

Don't directly download this file, use something like maven or gradle for this:
If you scroll down on this page: https://bintray.com/hansolo/Medusa/Medusa you will find the copy-paste parts.
There even is an example-project using that lib: https://github.com/HanSolo/medusademo

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