* Define `#get_path` to get file path from domain
* `#match_academic_domain?` and `#name_from_academic_domain` use `#get_path`
* Strip input `text` within `#get_domain`
* Replace `File.open` with `File.read` in `#name_from_academic_domain`
* Be more concise
* Ensure file is closed
* Add Travis CI
