Resolve "Create view Idea page"

Closes #8 (closed)

• - Let users view title, description, author, created on idea page
• - Show topic of idea, if any
• - Link "Wild ideas" if no topic assigned
• - Show phase of idea's topic
• - Show number of quorum votes
• - Show number of commeents
• - Show names of categories if any
• - Show basic list of comments
• - Create RPC for determining required quorum count given a space id
• - Show number of quorum votes required
• - Test vote numbers by adding actual students into db
• Let users cast votes and remove them again

Notes:

• Requires the postgrest unique-ideas branch
• No view for "View Topic" yet, this needs to be linked later
• Every user group can cast votes (should only be allowed for student)