Update Travis CI rules
Update Travis CI rules

gjtorikian/html-proofer,Tiger66639/html-proofer,Tiger66639/html-proofer,gjtorikian/html-proofer,Tiger66639/html-proofer,gjtorikian/html-proofer,Tiger66639/html-proofer,gjtorikian/html-proofer,gjtorikian/html-proofer,Tiger66639/html-proofer