Include checkbox to copy billing address to a profile address on Event Registration and Contribution pages

Using the code from Kurund here as a starting place - but dynamically checking for presence of and identifying the target profile address field names (profile id) - and other conditions noted by lobo in this thread:

http://forum.civicrm.org/index.php/topic,7719.msg50612.html#msg50612

Fixing patch up for core sponsored by Australian Breastfeeding Association