v0.1.6 be able to have mkt-prompt part of the page, html5 validation

Should this be renamed to mkt-form? 

**\<mkt-prompt\>**

![screen shot 2014-12-22 at 11 24 59 am](https://cloud.githubusercontent.com/assets/674727/5529794/2f4ce3a4-89cd-11e4-9a4a-318ae27d3fc4.png)

**\<mkt-prompt data-modal\>**

![screen shot 2014-12-22 at 11 25 36 am](https://cloud.githubusercontent.com/assets/674727/5529801/42477faa-89cd-11e4-8aae-8fc0388ada06.png)

Could just rename `CustomEvent` to `makeEvent` or something. I'm not sure how this would handle making a custom event called `'change'` or something. I guess if you want it to be a specific event like that you'd fall back to `Event`?