- Added a Tracer class. You can use it to print traces to a file, which can be easily enabled or disabled.
- Added a Tracer class. You can use it to print traces to a file, which can be easily enabled or disabled.

git-svn-id: a7fabbc6a7c54ea5c67cbd16bd322330fd10cc35@45809 b456876b-0849-0410-b77d-98878d47e9d5

tikiorg/tiki,changi67/tiki,oregional/tiki,oregional/tiki,changi67/tiki,changi67/tiki,tikiorg/tiki,oregional/tiki,oregional/tiki,tikiorg/tiki,changi67/tiki,changi67/tiki,tikiorg/tiki