make top idea page

[alex9311]

@PetervB did you say you would take this? The idea was to make a page where it shows the top 5 ideas by vote count

[alex9311]

I'm working on this today

[alex9311]

handing off to Peter, here is the branch: https://github.com/alex9311/TUD-Information-Retrieval-Group-02/tree/alex-top_five_page

[alex9311]

Still needs:

• table borders
• table columns correctly sized
• images showing and correctly sized, probably showing as thumbnails (see vote page for example)
• number of upvotes show
• title on page
• link to this page in the common header