Bart Blast

Support attribute values and text nodes.

E.g.

E.g. ``` abc ```

Assign a random component ID.

See: * lib/hologram/template/tag_assembler.ex * lib/hologram/template/embedded_expression_parser.ex

``` {@some_value} ``` @some_value should be defined in Component1's parent and passed to Component2 slot.

At the moment this works: `` but this doesn't: ``

Consider Web Workers, see: https://developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API