script. Includes change to ImportLogs system test and fix for import log custom variable handling (old behavior was to not set multiple custom variables if they were set already instead of simply adding custom variables).
making W3cExtendedFormat treat time-taken field as seconds by default (since that is what the W3C format specifies). Also add support for event tracking and cloudfront RTMP logs (which provide event logs). Also allow multiple spaces in between W3C extended log files. Allow derived classes of W3cExtendedFormat to define new custom field regexes.