Improved the precision of InklingsTracker.
Improved the precision of InklingsTracker.

* The image sizes of inklings in the header are slightly different.
  + The right-most image of my team is smallest than others.
* This change narrows the region to get the histogram.  It handles this size
  differences.
* Also added the logic to use the information of the lobby. If lobby.type is
  'public' or 'festa', the number of teams should be four.

deathmetalland/IkaLog,hasegaw/IkaLog,deathmetalland/IkaLog,hasegaw/IkaLog,deathmetalland/IkaLog,hasegaw/IkaLog