Merge branch 'mvillarejo'
core: limit page_size
readme: fix page_size value
- Added support for 'unassigned' pile (buyNow items go here!)
- Amended sendToTradepile to support moving items from unassigned pile
- auctionParse small function added to parser 'unassigned' items
  -> added a few intersted attributes: injuryGames, lastSalePrice, etc.

- getCredits function added just in case you need it separated.

- keepalive function to keep connection with servers open
- removed some comments from piles functions
cleanup
core: make itemParse compatible with unassigned method