participants-database.php
print_record_edit_form() altered to allow use of "record_id" attribute
print_single_record() altered to capture either 'record_id' or 'id' attributes
file upload extension checks are now case-insensitive

PDb_Pagination class
fixed page number calculations to handle zero values

PDb_Record class, PDb_Single class, PDb_Shortcode class
'id' attribute name changed to 'record_id'

git-svn-id: https://plugins.svn.wordpress.org/participants-database/trunk@817761 b8457f37-d9ea-0310-8a92-e5e31aec5664