Changed the default target of ant to "debug".
Added the entry for the link of
jp.gr.java_conf.neko_daisuki.anaudioplayer.

I make a symbolic link to src/jp/gr/java_conf/neko_daisuki/anaudioplayer
at the top directory with the name of
jp.gr.java_conf.neko_daisuki.anaudioplayer::

  $ ln -s src/jp/gr/java_conf/neko_daisuki/anaudioplayer \
  jp.gr.java_conf.neko_daisuki.anaudioplayer

I expect that this link makes development on the shell easy.
Added Makefile including "all" target only.

"make" is more easy to type than "ant". I like make.