History for Login and Logout

Samantha Zarate August 14, 2017:  Minor text fixes [5bf8e2f]
Thanh-Ha Nguyen January 20, 2017:  Minor edits to login-logout CLI page - Updated links to images - Fixed typos, formatting, and wording [87d1361]
Thanh-Ha Nguyen January 14, 2017:  Replaced UI/API-Token with new CLI login/out [c16b084]
Katherine Lai (kjlai) January 25, 2013:  Updated Login-and-Logout with updated dx output [dc947be]
Katherine Lai (kjlai) November 15, 2012:  [133ec57]
Katherine Lai August 23, 2012:  stuff [0143911]
Katherine Lai August 21, 2012:  [30c022f]
Katherine Lai August 21, 2012:  some reorg [8937b87]
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