Fix bug where Block with replace mode did not replace all child nodes
0.9.1
Allow passing keyword arguments to proxy.render and change encoding to 'unicode' by default (tests show it's faster) and don't pretty print by default.
0.9.0
Remove `ref` and just use `id` instead
0.8.10
Add slot to support weakref on the Html tag
0.8.9
Change tag attribute to use `set_default` instead of lower of class name. Rename `find` of ProxyTag to `xpath`.