Create README.md

Author: simnation

README.md

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+# JSimpleSim
+When building multi-agent simulations you want to focus on your model and the interaction of the agents. Looking for a suitable software can be tedious: Some simulation frameworks are easy to use, but hardly customizable for your task. Others are highly customizable but model building is a software development project of itself. And execution speed is yet another topic.
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+JSimpleSim offers a sensible balance between fast familiarization with the software, good adaptation to your modelling project and fast simulation speed. Written in Java and based on the discrete-event approach (DES), it has the following features:
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+- Easy model building
+- Powerful messaging system and efficient event queues
+- Separation of modelling and simulation – just try another simulator with the same model!
+- Sequential and concurrent simulation execution available
+- Dynamic model changes during a simulation run
+- Flexibility: cellular automata, hierarchical or meshed models – one tool for all. 
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+For more information and a tutorial visit the [JSimpleSim project page](https://jsimplesim.org/).