v0.4.4

• implemented market's new ping (required)
• implemented sending "trade is ready" to the market (required)
• added auto acknowledgement of the new trade protection (required to be able to accept trade confirmations)
• added --market-use-proxy argument which tells the market to perform actions using the proxy specified in --proxy, presumably to avoid steam bans
• added redownloading cacert if too old
• added deleting cacert if download failed
• prettified logging
• fixed an old, previously unnoticed problem with the expected market behavior, due to which only one single item could be taken
• changed sent trade offer timeout to 10 minutes after which its considered expired and canceled