Initial Development

I put together a README and a basic project structure to get things started. @pushred take a look at the README and let me know if this is headed in the right direction.
These are shorthand for `{{#if message}} {{{.}}} {{/if}}`, and in this case, I think it's more readable to have the closing tags match the opening tags, so that it's clear where the matching close tag is. They're all separate, as opposed to one `{{#if}}` block, because they're all optional, and you could have an alert that has any combination of these elements.