validation time. Added some i18n strings for deletion too.

  - i18n for institutions

setting loop doesn't work that well at all...

bugs to do with the $SESSION -> $USER change.

clean_filename to go.

done.

'pieform'

wrapper around $_SESSION, and $USER deals with system users and their
preferences.

resulting stuff to objects rather than arrays

still to come

of others:

Renames:
get_records -> get_records_assoc
get_records_select -> get_records_select_assoc
get_records_sql -> get_records_sql_assoc

get_rows -> get_records_array
get_rows_select -> get_records_select_array
get_rows_sql -> get_records_sql_array

Changed behaviour:
get_records_*_array now returns an array of objects, rather than an array
of arrays.