better handle renamed Casks in `brew cask info`

Fixes #4058
add Tap path info to `brew cask doctor`
Merge pull request #4094 from rolandwalker/info_on_renamed_casks

better handle renamed Casks in `brew cask info`
Merge pull request #4095 from rolandwalker/doctor_tap_paths

add Tap path info to `brew cask doctor`