Update readme to include read/write example.
Update readme to include read/write example.

AlterCodex/nxppy,Schoberm/nxppy,tuvaergun/nxppy,tuvaergun/nxppy,Schoberm/nxppy,AlterCodex/nxppy,tuvaergun/nxppy,Schoberm/nxppy,AlterCodex/nxppy