Custom element creation as part of the public API

[moll]

Hey,

As WebComponents and other contexts where custom events are more common have surfaced, have you considered making customParent et alii from the Internal module part of Blaze's public API? Perhaps with a shorter function name as well. :)

[ChrisPenner]

@jaspervdj
Curious if any thought has been given to this? I was planning to use Blaze to build up some XML, but of course I need the ability to create custom tags.

Thanks for the awesome tool!