Added multi-address support to scripts

FUNCTIONS FILE and MEMO - appt letter now have dynamic coding for
agencies with multiple addresses. Basically, what it USED to do was a
single agency address via the "agency_address_line_##" variables. This
doesn't help agencies like SW, Anoka, or SLC.

The new installer will create an array. Details can be found in the
comments for the FUNCTIONS FILE. As appt letter uses this code pretty
extensively, I've modified the dialog there as well.

Oh, while I was at it, I created a function for sending SPEC/MEMO lines,
just like case notes currently. Booyah!