get user items WIP
Permits user see his pocket items
Created cookie with user's key and BookmarkHandler
Fixed syntax
Pagination of api request with offset and count
Paginate Request to Pocket and more

If user already in db, send to users page.
Only add new bookmarks to Bookmark db.
Fixed some details about save_bookmarks()
Fixed weird error
Merge pull request #8 from cabe56/user-pocket-items

User can see his bookmarks