excludepages=<page>, no deleted changes, reformatting

 * Add syntax `excludedpages=page,ns:page` for excluding some pages from listing.
 * Fixes #20 don't show creations, edits and minor edits of already deleted pages.
    * looks a bit like #21

 * Remove duplicated isHidden check. (no idea why added in commit 1f8be9c ?)

Cleanup of some issues:
Close #6 - filtering on user works for me.
Close #7 - no feedback provided. Maybe too short changelog to show changes for all users.
Close #8 - Not updating is not reproduceable.
Close #10 - simple render signature works for me.