Added note categories, which are the priority levels of each note.
Removed parameter to the update function, thought I was going to have to use it, but ended up not.
created an updateExpirationEpoch function to keep pushing the expiration into the future if there is use of the account.
Updated user to have a constructor to create itself from it's session token.  Also added functions that allow the user to create notes, which are also a new included class.
Added a function to create a new note.  This will create a new note associated to the user that is associated with the session token passed in.