added "from" search pagination param

Changes: added the "from" parameter, also to tests and in readme.md.

I can't really tell what license you're using (references scattered in code mention MIT, Apache 2.0 and EPL 1.0 maybe you'll want to sort this out) but for the record, I signed the ECL.
It looks like you have changed the tab formatting of the document making it hard to see what has actually been edited.  Do you mind reformatting to be consistent with the rest of the project?