Peter White Television EditorEXCLUSIVE: XTR, the non-fiction studio behind films including wrestling doc You Cannot Kill David Arquette and the upcoming Magic Johnson feature doc, has secured a multi-million dollar investment from former Zappos CEO Tony Hsieh.The company, which was set up by Academy Award-nominated filmmaker and RYOT co-founder Bryn Mooser, has secured $17.5M and will allocate money for its own production slate, as a finishing fund to complete titles from doc filmmakers and for