Betterific spice plugin

**Plugin functionality**: This plugin uses the Betterific API to find relevant betterifs, tags, and users from betterific.com.

**Plugin data source (API)**: Betterific search API at http://betterific.com/api/search/all?q=duckduckgo

**Reason for API selection**: This is the only API offered by Betterific.

**Example queries**: betterif duckduckgo, duckduckgo betterific

**Plugin Audience**: Betterific is a digital suggestion box, a place where people submit and share innovative ideas. This plugin is entertaining (some of the betterifs are really funny--see http://betterific.com/fernandoiriasescher/Cheetos-came-with-chopsticks-included-to-keep-the-orange-stuff-off-your-hands/2099). It's also social; Betterific allows commenting and voting on betterifs.

**Have you done any cross-browser testing?** Looks good in Chrome and FF.