A new, Los Angeles-based startup, Tango, said this morning that it has raised $5.7M in a seed funding, for its software for streamlining the process of creating documentation. The company said the round was led by Wing Venture Capital, and also included General Catalyst, GSV Ventures, Outsiders Fund, and Red Sea Ventures. Angel investors include Michael Stoppelman (former Senior Vice President of Engineering at Yelp), Jai Ranganathan (former Head of Data at Uber), Shoaib Makani (CEO of KeepTruckin), and Julia Lipton (Awesome People Ventures). Tango is led by co-founder and CEO Ken Babcock, who is a veteran of Uber. The company says it now has thirteen full-time team members on its team.