Adding new fields to merci_reservation type which hold multiple values breaks merci_date_field location

To repeat:

* at admin/content/node-type/merci-reservation/fields add a new field of any type.
* choose unlimited for the Number of Values for this field.

Result:

location of merci_date_field moves from content_type_merci_reservation to content_field_merci_date. field_merci_date no longer shows up on reservation edit form. most sql queries are broken as content_type_merci_reservation is hard coded through out the module.

TODO: audit the code. the table and field names for all the cck fields should be determined programmatically or else adding fields to merci_reservation type should be disabled.

Example code to fix things:

  // Determine CCK table and columns the date data is stored in.
  $field             = content_fields('field_merci_date');
  $db_info           = content_database_info($field);
  $table             = $db_info['table'];
  $column_start_date = $db_info['columns']['value']['column'];
  $column_end_date   = $db_info['columns']['value2']['column'];