I have just pushed the experimental KC705 code to the repo.  Here is the project.  This is a DSP48E1 based design, and I have compiled and run it at 400MH/s.  Included with this new design is a UART interface, instead of JTAG, since the KC705 kit has an on-board USB-UART bridge.  See the README for more information on how to use the UART interface.  As an additional surprise, this code includes support for the Kintex's on-die temperature sensor.  Temperature readings are reported over UART, allowing external software to monitor the chip.  In the future I will add automatic shutdown on over-temp conditions.

Let me know if you run into any difficulty getting the project to compile with Vivado 2013.1 (or later).  I have never distributed a Vivado project before.  As usual, you will need an appropriate Xilinx license to compile the design.