v0/5/0, 7/13/2014 -- change folder to just 'userpass'... now import via "from userpass import Userpass, UserpassError"
v0.3.0, 7/11/2014 -- switch to new-style class with user/passwd properties
v0.2.0, 7/8/2014 -- allow filepath arg on init for load, user and passwd are now properties of class Userpass, added passwd_for(user)
v0.0.2, 7/5/2014 -- added optional parameter 'input_user' to Userpass.passwd()
v0.0.1, 6/30/2014 -- Initial Release
