Fix for a new layout of SearchResultList
Fix for a new layout of WorkList
Fix for a new layout of BookmarkList
Support when SearchResultList doesn't have a page navigator

Because: When the number of search result pages is 1, pixiv doesn't
display a page navigator. So, previous codes aborted on the grounds that
a parsed document doesn't have a node of page navigator.
Support when OwnedIllustList doesn't have a page navigator

Because: same as the last commit.
Merge pull request #2 from co-me/new-layout

Support new layouts