Merge pull request #4 from clavaque/000000-dev

Changed the readme.txt file
$wpdb->escape calls converted to esc_sql
Updating readme.txt file.
Updating ClickBank IPN Handler

- Adding a filter that can be enabled to tell s2Member to ignore completed billing cycles. Off by default. By default, s2Member DOES terminate account access when a billing cycle ends.
Merge remote-tracking branch 'upstream/000000-dev' into 000000-dev