Add readtoken and writetoken helpers to ddfs cli.
Add readtoken and writetoken helpers to ddfs cli.

mwilliams3/disco,oldmantaiter/disco,scrapinghub/disco,ktkt2009/disco,seabirdzh/disco,pooya/disco,simudream/disco,discoproject/disco,oldmantaiter/disco,scrapinghub/disco,seabirdzh/disco,seabirdzh/disco,mwilliams3/disco,mozilla/disco,ErikDubbelboer/disco,oldmantaiter/disco,pombredanne/disco,pavlobaron/disco_playground,mozilla/disco,pombredanne/disco,beni55/disco,simudream/disco,pombredanne/disco,ErikDubbelboer/disco,mwilliams3/disco,simudream/disco,mwilliams3/disco,pombredanne/disco,discoproject/disco,pooya/disco,ErikDubbelboer/disco,scrapinghub/disco,ktkt2009/disco,pavlobaron/disco_playground,beni55/disco,pombredanne/disco,beni55/disco,scrapinghub/disco,simudream/disco,oldmantaiter/disco,discoproject/disco,simudream/disco,discoproject/disco,ktkt2009/disco,seabirdzh/disco,oldmantaiter/disco,mozilla/disco,beni55/disco,pooya/disco,pavlobaron/disco_playground,ktkt2009/disco,pavlobaron/disco_playground,ErikDubbelboer/disco,mwilliams3/disco,ktkt2009/disco,ErikDubbelboer/disco,beni55/disco,pooya/disco,discoproject/disco,mozilla/disco,seabirdzh/disco