upgrade bootstrap

Signed-off-by: Sebastien Varrette <sebastien.varrette@uni.lu>
add motd script

Signed-off-by: Sebastien Varrette <sebastien.varrette@uni.lu>
complete README

Signed-off-by: Sebastien Varrette <sebastien.varrette@uni.lu>
compleet Rakefile

Signed-off-by: Sebastien Varrette <sebastien.varrette@uni.lu>
complete gitignore

Signed-off-by: Sebastien Varrette <sebastien.varrette@uni.lu>