Add base.hbs + wrap.hbs & helpers.

This simplifies the CSS/JS/Images -- everything (static) lives in the style repo.

It also standardizes the page boilerplate.

![splash](https://f.cloud.github.com/assets/37303/2124093/41d1fb3c-9238-11e3-856c-15191423c79c.png)

![speakers](https://f.cloud.github.com/assets/37303/2124094/485f8c3a-9238-11e3-8c2c-99101d2ecc60.png)

The meetup page is still unstyled, and there's more work to be done... well, pretty much everyplace, but it's a start.