Add news sources from the Mountain time zone

[huertanix]

Would be great to see the major papers of the American west in the mix:

• Arizona Republic: https://www.azcentral.com/
• Las Vegas Review-Journal: https://www.reviewjournal.com/
• Denver Post: https://www.denverpost.com/
• Deseret News: https://www.deseretnews.com/
• Idaho State Journal: https://idahostatejournal.com/