Added etcdget and etcdset actions thatw ill help with sharing state.

Either cross container state
or state from outside, for example ftest might want to retrive IP's,
nodeids and such.
Storing contianers IP's and exposed ports in etcd. added that info to "pickett ps"
tweak
Fixes to etcd commands
pickett etcd
Merge pull request #90 from tcolar/etcd

Pickett etcdget & etcdput commands + storing Ips / ports in etcd and showing them in pickett ps