initial commit of ported Block RAM

libraries/technology/ip_ultrascale/ram/README.txt

libraries/technology/ip_ultrascale/ram/hdllib.cfg

.../technology/ip_ultrascale/ram/ip_ultrascale_ram_cr_cw.vhd

...echnology/ip_ultrascale/ram/ip_ultrascale_ram_crw_crw.vhd

...chnology/ip_ultrascale/ram/ip_ultrascale_ram_crwk_crw.vhd

...es/technology/ip_ultrascale/ram/ip_ultrascale_ram_r_w.vhd

...ale/ram/ip_ultrascale_simple_dual_port_ram_dual_clock.vhd

...e/ram/ip_ultrascale_simple_dual_port_ram_single_clock.vhd

...scale/ram/ip_ultrascale_true_dual_port_ram_dual_clock.vhd

libraries/technology/memory/hdllib.cfg

libraries/technology/memory/tech_memory_component_pkg.vhd

libraries/technology/memory/tech_memory_ram_crw_crw.vhd

libraries/technology/technology_pkg.vhd