Note that the Avnet-provided 2014.2 Board Definitions also work for Vivado 2014.3 and 2014.4. Xilinx does have a 7010 built-in Board Definition that works fine. If you want both the 7010 and 7020, then download the Avnet-provided definitions and instructions on the Documentation page:
http://microzed.org/support/documentation/1519
Bryan