ItemSaleCache (still erraneous)
New icons for stats
item sales caching implemented.
To do: use cached values
Merge issue#1 (itemstats)
merge
Merge branch 'issue#1' of https://github.com/tlamy/WowAuctionHouse.git
into issue#1

Conflicts:
	Model/AuctionCache.php
	Model/AuctionImport.php
	Model/Item.php
Merge branch 'issue#1'