Update README

Make the project installable for Ubuntu 13.10
fix typo. fix freeze. by @lks128 on issue/1
Indent exit(0)
Set classpath via parameter

That way it works both in bash and zsh
Include screenshot
Give proper credits
Merge pull request #4 from izidormatusov/master

Updates to source so that it runs better out of the box in current distros (2014). Thanks @izidormatusov.