Showoff problem

[samascience]

show off is not working installed ruby 1.8

when running showoff serve
i am facing the following problem .

image sizing disabled - install rmagick
:public is no longer used to avoid overloading Module#public, use :public_dir instead
from /var/lib/gems/1.8/gems/showoff-0.7.0/bin/../lib/showoff.rb:39
You should include GLI::App instead
GLI.run no longer works for GLI-2, you must just call `run(ARGV)' instead
either fix your app, or use the latest GLI in the 1.x family