1. revised webapp.js to handle JSONP requests for many calls, by
parsing queryString for callback and wrapping it around JSON.

2. revsied search.js, webapp.js, and api.js to remove dependency in
search.js on NIF autocomplete. The client-side ajax call in search.js
now calls /autocomplete/<term>.json. Webapp processes this call by
calling bbop.monarch.Engine.prototype.searchSubstring, which passes
the call through to NIF, thus limiting dependencies to api.js
added comment on jsonp code suggesting that we call response.jsonp()
when we upgrade to ringo .10...
Revised home page to include snippet content. Added acknowledgment
footer.
Merge branch 'master' of https://github.com/monarch-initiative/monarch-app

merging to connect autocomplete, jsonp, and home page revisions with
merging branches for jsonp, autocomplete, and new home page into head
finishing the merge of the jsonp, autocomplete, etc.