dotify github with non-case-sensitive username

[cyrus-captap]

On github, it doesn't matter whether you enter your username with upper or lower case, it'll work. On dotify, it won't find my dotfiles if I enter trevoke/dotfiles but it'll find it if I enter Trevoke/dotfiles.

It would be nice if I could use all lower case.

[mdespuits]

@cyrus-captap Unfortunately, I haven't had much time to work on this gem recently. I will see if I can get to it soon, but if you want to make a PR, I would be happy to merge it!