Updated readme with "installation guide".

README.md

@@ -1,5 +1,18 @@
 # IssueTracker
 
-Repository as part of a university project from the Software Engineering course.
-
-A simple self-made bug/issuetracker for personal or grouped usage.
+Repository as part of a university project from the Software Engineering course.
+
+A simple self-made bug/issuetracker for personal or grouped usage.
+
+## Installation
+
+Install the jar file from the latest release an run it via "java -jar issuetracker.jar".
+Then the application will start by itself.
+
+Go to your web-browser of choice and enter "http://localhost:8080" and you can start using the issue tracker.
+
+## Manual installation
+
+You can also run the application without the jar file from the release by executing the "IssueTrackerApplication.java" file from the plugin sub-module if you choose to run the issue tracker from the source project.
+
+From there you can use the same address in your web-browser to use the issue tracker.