By Jennifer Saba and Deepa Seetharaman NEW YORK (Reuters) – Amazon.com Inc ramped up its push into hardware on Wednesday with the debut of six new or upgraded devices, including a high-end $199 e-reader called the Kindle Voyage and its cheapest-ever touch-screen tablet. The No. 1 U.S. online retailer also revamped its basic Kindle e-reader to include a touch screen. It will cost $79, about 15 percent more than the current basic model. …
