TPAC - Password messages

TPAC - Password messages

In jspac a message appeared when the patron went to change their
password stating the requirements.  This same message is missing
in TPAC.  The wording from jspac has been added and styled to
update_reset.tt2.

Also improved is the message when requesting a forgotten password.
Patrons are unaware that a vaild email address needs to be in
their record until after they try to send a reset.  Wording and
styling has been added to password_reset.tt2 to explain the need
for an email address.

Signed-off-by: Melissa Lefebvre <mlefebvre@biblio.org>