Consolidated text changes - not in the big text edit

[devinmckinney]

These are the text changes I submitted that are not included in the big text edit/Excel we did.

Message when offer has been made

Add item to watchlist.
Someone place an offer (only 1)
Go to item in watchlist, click Offers.
Text reads: 1 other users have placed an offer on this item.
Change to: 1 other user has placed an offer on this item.
Note that if there are more than one offers, then the text changes to :
X other users have placed an offer on this item. ;I think this is as is now, you just have to make a special case when there is only one offer.

Update Beta Agreement date

I reviewed the Beta Agreement, it is fine for an open beta.
I suggest we just update the date at the top and bottom:

Change
Last Modified: 15th May 2015
to
Last Modified: October 1 2015

Improve error when you make an offer on something that already has an offer

I managed to propose a deal twice, got this error message. Not sure if I should ever be able to get to this situation, but if so need a better title for the error.
Suggestions: "Too late, ha ha" or "You lose Buckwheat" or "Item no longer for sale" would be better.