MTGO Library 6.20

ML Bot 6.20 includes a couple of fixes and some improvements:

• 6.20 keep tracks of the trade duration. After tomorrow downtime, 6.20 users will be able to view the duration of the trades directly in the TradeLog.
• for some bots we activated an alternative connection mode with the server. The new mode is more reliable than the current one and will be rolled out to all the bots in few days
• the reload of many PersonalPrices.txt does not display the message box "I am loading 3 PersonalPrices.txt [...]" , save for the first time. The idea is that none is looking at the screen and press "enter" save for the first time (the message box will automatically close in 30 seconds)