Changes on porting from Linux development environment to Mac.
Write view and specs for signin form.
Write spec for signin page ensuring error message does not persist after visiting another page.
Working on "create" action for SessionsController.
Add "scratch" to .gitignore.
Code for remember_token to facilitate secure persistent user sessions.
SessionsHelper signin method and current_user setter and getter.
Fix incorrect method signatures in SessionsHelper, and add signed_in? method.
Minor reorganization in SessionsHelper.
Change page header layout to provide either drop-down menu or sign-in
button depending on whether user is signed in.
Make user be signed in immediately on sign-up; and enable proper
sign-out,
with redirection to root page on sign-out, deletion of session cookie etc.