class Ltspice < Cask url 'http://ltspice.linear-tech.com/LTspiceIV.dmg' homepage 'http://www.linear.com/designtools/software/' version '4' sha256 'bb7414894b20bffda819560a9604c8c6218b9ca0cb72468ea6f82468f6cf3cb1' link 'LTspice.app' end