second part of c++11 update. gcc 4.5 and VS 2010 are no longer supported

- BOOST_FOREACH -> for
- replaced several boost classes with std (e.g. unordered)
- removed gcc-4.5 workarounds
- ran clang c++11 migration tool to detect some cases:
- - pointer initialized with "0" to nullptr
- - replace for with iterators with range-based for
- - use auto in some situations (type name specified twice, avoid long iterators type names)

lib/logging/CLogger.cpp

@@ -197,7 +197,7 @@ void CLogger::callTargets(const LogRecord & record) const
 	TLockGuard _(mx);
 	for(const CLogger * logger = this; logger != nullptr; logger = logger->parent)
 	{
-		BOOST_FOREACH(auto & target, logger->targets)
+		for(auto & target : logger->targets)
 		{
 			target->write(record);
 		}
@@ -245,7 +245,7 @@ CLogManager::CLogManager()
 
 CLogManager::~CLogManager()
 {
-	BOOST_FOREACH(auto & i, loggers)
+	for(auto & i : loggers)
 	{
 		delete i.second;
 	}