fixed ../Casks/ path in app.js and /modules/parse-cask-files.js

Seems that I fixed Issue #5 (at least for myself).
I had to change caskPath from '/usr/local/Library/Taps/phinze-cask/Casks/' to
'/usr/local/Library/Taps/caskroom/homebrew-cask/Casks/'.

This also fixes https://github.com/seethroughtrees/homebrew-dotfile-generator/issues/5

greetings,

Florian