[dev] Added #2491 core changes

[mjmadsen]

Short Description:
Added the core changes from #2491 to current dev branch.

[nikhil-pandey]

2016-08-04 16:02:36,641 [PokemonGoBot] [INFO] [bot_start] Starting bot...
2016-08-04 16:02:39,927 [       cli] [INFO] 
2016-08-04 16:02:39,930 [       cli] [INFO] Ran for 0:00:14
2016-08-04 16:02:39,932 [       cli] [INFO] Total XP Earned: 0  Average: 0.00/h
2016-08-04 16:02:39,935 [       cli] [INFO] Travelled 0.00km
2016-08-04 16:02:39,937 [       cli] [INFO] Visited 0 stops
2016-08-04 16:02:39,939 [       cli] [INFO] Encountered 0 pokemon, 0 caught, 0 released, 0 evolved, 0 never seen before
2016-08-04 16:02:39,941 [       cli] [INFO] Threw 0 pokeballs
2016-08-04 16:02:39,943 [       cli] [INFO] Earned 0 Stardust
2016-08-04 16:02:39,945 [       cli] [INFO] 
2016-08-04 16:02:39,947 [       cli] [INFO] Highest CP Pokemon: 
2016-08-04 16:02:39,949 [       cli] [INFO] Most Perfect Pokemon: 
Traceback (most recent call last):
  File "./pokecli.py", line 486, in <module>
    main()
  File "./pokecli.py", line 122, in main
    raise e
pokemongo_bot.tree_config_builder.ConfigException: stat 'xp_per_minute' isn't available for displaying

[douglascamata]

@mjmadsen I already talked with the author of #2491 and he will modify it to be merged soon. There's no point in opening more PRs with the same changes.