Create README.md

Author: mgeldi

README.md

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+# ASAPJava
+Asynchronous Semantic Ad-hoc Protocol (ASAP) engine for Java
+
+# Maven Guide
+## Compile and run tests
+```
+mvn clean package
+```
+This compiles all files, runs tests and, if they succeed, compiles the jar. The compiled jar (ASAPJava-{Version}.jar) will be in your target/ folder.
+
+## Compile without tests
+This is needed in case you want to build the jar while your tests fail (which currently, they do fail).
+```
+mvn clean package -DskipTests
+```
+
+# Wiki
+Visit [the wiki](https://github.com/SharedKnowledge/ASAPJava/wiki) for all other information on what ASAP is and how to use it.