Update PHPStorm EAP to 138.1161
Merge pull request #322 from cweagans/patch-1

Update PHPStorm EAP to 138.1161
Delete rust-nightly.rb

This is [in the main homebrew-cask project now](https://github.com/caskroom/homebrew-cask/blob/master/Casks/rust.rb), so I think it shouldn't be here anymore.
Merge pull request #323 from jsanders/patch-1

Delete rust-nightly.rb
Merge with upstream
Merge latest changes