[ENH] Extract references when exporting group information

git-svn-id: file:///var/local/code.tiki.org/tikisvn/trunk@50388 b456876b-0849-0410-b77d-98878d47e9d5
[ENH] Additional validation, including newly added currency in the service output (Israel Post Payment)

git-svn-id: file:///var/local/code.tiki.org/tikisvn/trunk@50389 b456876b-0849-0410-b77d-98878d47e9d5
[ENH] Add values and old values by permname into event


git-svn-id: file:///var/local/code.tiki.org/tikisvn/trunk@50390 b456876b-0849-0410-b77d-98878d47e9d5