v2.1 changelog (#564)
v2.1 changelog (#564)

* initial v2.1 changelog update

* added python packages

* grammar fixes

* updates from Parimal

* bullet move

* added :80 port listening

* deprecated grove color sensor

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