Add Device class at top-level
Add Device class at top-level

cathalmccabe/PYNQ,schelleg/PYNQ,Xilinx/PYNQ,schelleg/PYNQ,Xilinx/PYNQ,cathalmccabe/PYNQ,cathalmccabe/PYNQ,schelleg/PYNQ,schelleg/PYNQ,cathalmccabe/PYNQ,yunqu/PYNQ,cathalmccabe/PYNQ,cathalmccabe/PYNQ,Xilinx/PYNQ,yunqu/PYNQ,yunqu/PYNQ,Xilinx/PYNQ,yunqu/PYNQ,Xilinx/PYNQ,yunqu/PYNQ,schelleg/PYNQ