add Notice about package structure changed to README.
add Notice about package structure changed to README.

desp0916/gopsutil,vrecan/gopsutil,yyljlyy/gopsutil,choplin/gopsutil,monicasarbu/gopsutil,mayowa/gopsutil,neezgee/gopsutil,andyjones/gopsutil,oliveagle/gopsutil,influxdb/gopsutil,andyjones/gopsutil,lonemage/gopsutil,oliveagle/gopsutil,xiaoyanit/gopsutil,lonemage/gopsutil,monicasarbu/gopsutil,desp0916/gopsutil,jmptrader/gopsutil,yyljlyy/gopsutil,xiaoyanit/gopsutil,choplin/gopsutil,chendrak/gopsutil,chendrak/gopsutil,influxdb/gopsutil,neezgee/gopsutil,jmptrader/gopsutil,vrecan/gopsutil,mayowa/gopsutil