unable to load colour scheme with recent homebrew version of MacVim

[benfranklin79]

Not sure if this is specific to MacVim or whether it's because I've recently moved to yosemite
It's the first time I've tried this colour scheme on my mac. It's worth noting that it works fine on my windows machine at work.

Initially the scheme would not load up when opening up MacVim (which I think is a separate issue which I'm currently trying to solve). However, when I place railscasts.vim in ~/.vim/colors and run the command :color railscasts as a test I get the following output:

Error detected while processing /Users/benfranklin/.vim/colors/railscasts.vim:
line 6:
E492: Not an editor command: ^M
line 7:
E474: Invalid argument: background=dark^M
line 8:
E411: highlight group not found: clear^M
line 9:
E15: Invalid expression: exists("syntax_on")^M
line 97:
E171: Missing :endif