Long time passed and now I changed my site with some information and I want to google bot force fully crawl site again. Is this possible or how?
if you haven't set up google webmaster tools you can set that up with your site and google will crawl it
Easy. Just bookmark your site at 5 - 10 top-traffic social bookmarking sites like digg, delicious, stumble, reddit, pinterest, buzzfeed, twitter, fark, slashdot etc... Why? Because these sites have so much traffic and so much changing content that the spider practically lives at such places. If you put your link on a few of these sites it will definitely be crawled asap. Furthermore, you could ping your site and alert all the search engines that content has been updated on your site. The place I like to ping is at: pingoat (dot) com. Good luck with you site.
Is it also worth creating a new sitemap including the new content and adding this to your analytics (or resubmitting if you already have one)? Does this have any impact on speeding up the process of getting your new content noticed?