after changes applied; tutorial functional with gadfly.

in setLocal() was improperly indented.

Evan: please, Please, PLEASE, run the test suite before checking in
changes!

__*attr__ magic methods don't work when you add them after the class is defined, so add them during class definition.

Implemented alternate path '|' operator.
Added 'default' builtin.
Made Expression types available to python expressions as functions.
Changed the way render() calls DTML.

Change WebDAV traversal to only turn off acquisition on the final traversal step.  This prevents a conflict with VirtualHostMonster.

Add SafeMapping class, for use when mappings (or MultiMappings) need to be exposed to restricted code.

with SecureMultiMap wrapper.

There's nothing you can't fix with another layer of indirection, except
for too many layers of indirection.

locale support

Added TypeError to the exception handler which is invoked when index_object is called on a method which expects arguments.

at least one space precedes the first underscore. This is neccessary
for handling underscores inside DTML vars.

has been recognized as string to be underlined.