Updating news database to the new website.
 * s/information\/papers.html/documentation\/papers.html/g
 * Bug tracker is now https://www.mercurylang.org/bugs/
 * Tutorial points to http://www.mercurylang.org/documentation/papers/book.pdf

news/newsdb.inc:
    As above.
Merge pull request #10 from sebgod/fix-newsdb-links

Updating news database to the new website.Thanks, this is good.