Mission Editor: allow referencing image/sound files in mod archive
Display forum post timestamp as tooltip (works for edit time too)
Print full date in chat history on chime.
Merge pull request #27 from db81/full_date_in_chat_history

Print the full date in the chat history on chime.
Site login uses FirstOrDefault account in DB instead of SingleOrDefault (prevents http://zero-k.info/Forum/Thread/7364#98980)