linux-topic: Add dyplo support by default
Add preliminary zc706 support

Untested, and uses copy of zc702 defconfig.
Make scripts executable. Change dtb default name to include "dyplo"
removed MACHINE_EXTRA_RRECOMMENDS (audio and oled) for zedboard configuration
added dyplo-example-image recipe and matching fpga-image-examaple recipe
Edited dyplo-example-image and fpga-image-example recipes
updated revision to checkout from fpga-image-example repo