HN Search updated again

We have just updated HN Search (http://hn.algolia.com) with major improvements:

- Mobile version: it now works just like your desktop version. You can select what you want to search (all, story, comment, poll) and refine/sort your queries by date (last 24h, past week, past month, forever).

- Phrase queries: they are now supported in the parser using "" syntax. This syntax also disables prefix search and typo tolerance for the terms of the phrase query.

- Not: we have added support of negative terms in your query (using -term syntax).

As usual, your feedback is more than welcome. We also appreciate pull requests & feature requests on our GitHub repository: https://github.com/algolia/hn-search