Added ref to Little Lisper.
Added ref to Little Lisper.

c-wade/Ruby-Koans,kaichanvong/Ruby-Koans,rizwanreza/ruby_koans,Jayphen/Ruby-Kegels,ozzloy/ruby_koans,dsryan/ruby-koans,coreyhaines/ruby_koans,filipzalewski/ruby_koans,seankibler/ruby_koans