Bid System - NOT COMPLETE

WARNING: This is not the final version, I am simply checking in and
syncing html element changes for Alan Guo to commence the styling he
needs to do.

Right now:
- A new bid can be entered and displayed in the chart
- The owner of the post can see "SELL NOW" or "BUY NOW" buttons for
their posts
- DOES NOT fully have the contact preference and transaction response
incorporated