Add test with an infinite loop
Minor build file fixes

* fix the src-release target;
* fix the javadoc target;
* set the default target to slim-jar;
* add a placeholder README for the missing libs;
* remove obsolete dirs creation;
* make the clean target remove the tar.bz2 file.
README: mention JavaHelp dependency and CLASSPATH

JavaHelp is required to compile EduMIPS64, so let's make this requirement more
explicit and let's spell out an example of how to properly set the CLASSPATH.
Fix launcher script

* update version and main class name;
* fix the jar name;
* display splash image.