By William Opalka Despite mild temperatures that dampened its fourth-quarter performance, Eversource Energy posted 2015 results that easily bested its previous year’s earnings. The company also increased its quarterly dividend 6.6% to $0.445/share. Eversource reported 2015 earnings of $878.5 million ($2.76/share), compared with 2014 earnings of $819.5 million ($2.58/share). Full-year...