ArchiSteamFarm V1.1 (pre1)

• Added new config property, FarmOffline which defaults to false. When true, account won't appear as online during farming, so you can farm steam cards while actually being "offline" in Steam Community, this is especially useful for primary accounts so your friends won't see you as online when only ASF is running.
• Added new config property, HandleOfflineMessages which defaults to false. When true, ASF will handle offline messages sent to your account. This comes useful basically only when FarmOffline is true, because then bot can respond to your commands even while being offline!
• Added internal ASF logging, ASF will now automatically create and maintain log.txt in the same directory as the executable. Log doesn't contain any sensitive data, and can be useful for debugging purposes.
• Hopefully fixed rare bug which would cause your account renamed to [unassigned].
• Many internal improvements and bugfixes regarding Steam coming from up-to-date SteamKit2.