Add full_name method
Define user object in session
add logout feature
Set only member id into session; Define current_member helper method to return member object; Add log out and login into home page
Reestructure home HTML
Session is accessed by helper method "current_member"
Merge pull request #5 from tiger-swallowtails-2013/set_current_user_object_in_session

Set current user object in session