project cleanup

- test classes (src/test/*) moved to separate root
- stray .class files dropped
- binary files (bin/, dist/full/, dist/obfuscated/) excluded from the repo
- .classpath and .gitignore updated accordingly
- invalid import statements removed

.classpath

@@ -2,6 +2,7 @@
 <classpath>
 	<classpathentry kind="src" path="src"/>
 	<classpathentry kind="src" path="timer"/>
+	<classpathentry kind="src" path="test"/>
 	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
 	<classpathentry kind="lib" path="lib/timer/timer.jar"/>
 	<classpathentry kind="output" path="bin"/>