add files for standalone compilation without sdk
fix CvPlot::isImpassable() so that it checks for mountain also. Remove mountain checks from rest of the code.
fixed CvPlot::IsChokePoint()
always settle best area

Conflicts:
	CvGameCoreDLL_Expansion2/CvEconomicAI.cpp
fix settle logic if initial plot became blocked

Conflicts:
	CvGameCoreDLL_Expansion2/CvHomelandAI.cpp
better retargeting for settlers
add logging for city attack
major rework of city site selection logic
adjust xml for settling
logging cleanup
add plotmap tool
more smoothing for happiness threshold
reduce weight for already owned tiles in city site selection
speed optimizations:
- direct plot neighbor lookup.
- more efficient checks for freshwater buildings and active beliefs.
- calculate plot found values only if we have a settler
preparation for multithreading. added const qualifiers
fix compilation without FINAL_RELEASE flag
implemented multithreading for city strategy evaluation
added parallel evaluation of economic strategies