Merge pull request #2 from BlueRaja/OnTradeSuccessful

Updates to OnTradeComplete
Merge pull request #494 from waylaidwanderer/TradeComplete

Adds a "TradeComplete" method to SteamBot
Fix: web-related crashes

Edited:
Bot.cs - BackgroundWorkerOnDoWork(...)
Added: other exceptions + restart
Improving error messages and fixing non-restarting bug
BUGFIX (to laggingpyro's stuff): Not sure what the purpose of this was, but it appears to cause an infinite loop sometimes