Listing Countdown timer

[eld120]

Problem Statement As an end user I should be able to tell from the listing detail page when the auction is going to end.

Proposed Solution Implement a timedelta in django and decrement the timedelta in JS on the front end. (I think)

[eld120]

Leaving open to clean up the UX.

• make bid submit button inactive or invisible at auction end
• clean up the transition from 0 min and 0 s to "Auction Ended"