OpenHoldem_7.7.9

Tagging OpenHoldem_7.7.9 for release

v7.7.9 2015-08-22

BUG FIXES:

• The lookup for the symbols didbetsizeroundX was broken.
  Thanks to Ngels for reporting.
  [THF]

MAINTENANCE:

• move symbol firstraiser_chair to CSymbolEngineRaisers::CalculateRaisers()
• delete CSymbolEngineChairs::CalculateFirstRaiserChair()
• update CSymbolEnginePokerTracker.cpp
  [DevBot]