Python API documentation generation tool Code

- If a class's metaclass is known, then show that class instead of
'Class' on its class html page
- When displaying class description tables, don't bother with the
'type' column -- it's always empty anyway.
- If a property's fget/fset/fdel function has the name '??', then
don't bother to list it.

- Added 'metaclass' var to ClassDoc, to record the metaclass (when
defined)

- Minor changes to TerminalController class

- Added support for the syntax `name <target>` in rst interpreted
text roles.

- Added support for the syntax `name <target>` in xlink.

- If the source file is not encoded correctly, then issue an error
(rather than crashing) and give up on parsing.

- Minor css fix for subclass list

- If the source file is not encoded correctly, then recover as well
as we can, and issue a warning.

Fixed a bug that caused exceptions to propagate when reading a
metadata variable failed.

- Moved TerminalController to epydoc.util
- Added TerminalController.render