Added some REPL coloring.
Removed Alan Dipert's code and used a different approach, instead.
Added improved colored prompt.
Added JRuby JNA Posix library as a dependency.

This will allow us to change directories, which ordinarily you cannot do in JVM
languages.
Added code from Allen Rohner that supports cd.

Take from this code:
  https://github.com/arohner/lein-daemon/blob/master/daemon-runtime/src/leiningen/daemon/runtime.clj
Added logo images.
Updated README.