Migrate to Vivado
Cleanup for Vivado project.
Prevent tcl script from importing files, they should be referenced from the original locations.
Add create_project script, don't import PS files into project.
And finally, add xdc files, don't import them.
Merge branch 'master' of https://github.com/Fred3/parallella-hw into vivado_projects

Created a 7010 project

Conflicts:
	README.md
	boards/parallella-I/constraints/parallella_timing.xdc
	fpga/hdl/parallella-I/parallella_z7_top.v