Update README.md
small updates
Merge remote-tracking branch 'origin/docs' into cocos2dx-v3

Conflicts:
	Soomla/CCEventHandler.h
	Soomla/CCIStoreAssets.h
	Soomla/CCSoomla.h
	Soomla/CCSoomlaJsonHelper.h
	Soomla/CCSoomlaNdkBridge.h
	Soomla/CCStoreController.h
	Soomla/PurchaseTypes/CCPurchaseWithVirtualItem.h
	Soomla/data/CCStoreInfo.h
	Soomla/domain/CCMarketItem.h
	Soomla/domain/CCPurchasableVirtualItem.h
	Soomla/domain/CCVirtualCategory.h
	Soomla/domain/CCVirtualItem.h
	Soomla/domain/virtualCurrencies/CCVirtualCurrencyPack.h
	Soomla/domain/virtualGoods/CCEquippableVG.h
	Soomla/domain/virtualGoods/CCLifetimeVG.cpp
	Soomla/domain/virtualGoods/CCLifetimeVG.h
	Soomla/domain/virtualGoods/CCSingleUsePackVG.h
	Soomla/domain/virtualGoods/CCUpgradeVG.h
fix merging error
fix deprecated code
update android submodule
update jars
migrate to soomla-cocos2dx-core

implement common part
implement ios part
make Android C++ compilable
refactoring
refactoring
migrate to soomla-cocos2dx-core

update android
update android-submodule
update project to android-core
change NULL to nullptr
remove soomSec
migrate to soomla-cocos2dx-core
move common classes from solution to core
move common classes from solution to core
update ios submodule