Human resources outsourcing and payroll services giant Automatic Data Processing is moving aggressively to take advantage of the burgeoning growth in smartphone and tablet usage in the workplace. The latest installment of FierceDeveloper's Developer Workshop series profiles ADP's Mobile Solutions app, a free human resources app that enables mobile employees to check their HR, payroll and benefits information anywhere their jobs may take them. FierceDeveloper spoke with Roberto Masiero, ADP's vice president of enterprise application architecture, about  the process of building ADP Mobile Solutions app, the virtues of HTML5 and the opportunities awaiting developers whose efforts target the enterprise. Special feature