Multiple additions and changes

Added login.cfm and session management/rotation functions to
Application.cfc (WIP - additional functions and a session table
forthcoming)

Added a routine to generate a session id to utils.cfm

Modified signup.cfm to change the case of the stored password hash to
lowercase, and to set focus on the email field when entering the page

Modified si.cfm to set focus on the name field when entering the page

Modified index.cfm to make all form fields required and add a name to
the login button to process in login.cfm

Modified text in vid.cfm to indicate the speaker can modify their
information by logging into the system

Added private directory (cfslpriv) and placeholder index.cfm as are
where speakers (and admins) will log into

Added signin.css from bootstrap examples for the login.cfm page