Bugfixes, change logger, update copyright

- IR field in status panel now correctly displays the next instruction
  to be executed, instead of the instruction that was just executed.

- Switched from built-in Java util logger to Logback

- Updated all copyright strings to 2016

pom.xml

@@ -35,6 +35,11 @@
         </repository>
     </repositories>
     <dependencies>
+        <dependency>
+            <groupId>ch.qos.logback</groupId>
+            <artifactId>logback-classic</artifactId>
+            <version>1.1.3</version>
+        </dependency>
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>