reorganize folders, add tcl/sh vivado proj scripts

src/constraints/Nexys4VideoA7_Sobel.xdc

src/constraints/Nexys4_Sobel.xdc

src/data/dancing_spider.txt

src/hdl/DualPortRamGeneric.vhd

src/hdl/SinglePortROMFileInitGeneric.vhd

src/hdl/adrgenUnit.vhd

src/hdl/automate.vhd

src/hdl/gradientUnit.vhd

src/hdl/operativeUnit.vhd

src/hdl/pixedgeReg.vhd

src/hdl/regUnit.vhd

src/hdl/sobelProc.vhd

src/hdl/sobelSys.vhd

src/hdl/tb_adrgenUnit.vhd

src/hdl/tb_automate.vhd

src/hdl/tb_gradientUnit.vhd

src/hdl/tb_operativeUnit.vhd

src/hdl/tb_regUnit.vhd

src/hdl/tb_sobelProc.vhd

src/hdl/tb_sobelSys.vhd