Alternative syntax for "install" command?

Hyperscript's behaviors are a wonderful thing, but instantiating them on an element always reads a little funny. @dz4k has promoted `I am` as an alias for the `install` command, as in ``. While this reads wonderfully, it could certainly be trouble for the parser. Here are two alternatives to consider:

## "Use"
We're not currently using the keyword `use`, and it seems to fit semantically, as in:

```

```

## Distinct Attribute
Since this is such a DOM-speciic feature, it might work well to separate it into its own attribute -- something like:
```

```
or even
```

```

Thoughts?

El issue no menciona ningún archivo de implementación ni ninguna prueba. Empieza por localizar el punto de entrada del parser y el manejo del comportamiento del DOM; después, compara la sintaxis `use` propuesta con las alternativas que usan atributos distintos. Se considera terminado cuando haya una sintaxis acordada y la cobertura correspondiente del parser y del comportamiento.

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