ArchiSteamFarm V1.6

• Added !rejoinchat command, which can be executed to issue JoinChat request on all connected bots.
• Enhanced !addlicense command, it now accepts more than one game, use !addlicense 1,2,3 and !addlicense <BOT> 1,2,3
• Until Mono 4.3 stabilizes, ASF is compiled with (and requires) .NET 4.5.1 (again), previously - .NET 4.6.1.
• Improved SendOnFarmingFinished, now ASF will send trade only if it in fact farmed something and not always.
• Increased farming check interval from 15 minutes to 60, this should minimize the side effect of refreshing sessionIDs and annoying users with primary accounts.
• Fixed ASF failing to !loot the inventory with non-tradable steam items, thanks to @il-marc
• Fixed rare issue when bot would not try to reconnect in some unusual disconnect scenarios
• Fixed main RequestLimiter time being too short for over 100 enabled bots in ASF, some of them could not connect right away.
• Many other bugfixes, improvements and code optimizations. ASF should be also a little less memory intensive now.