merged concurrent to main library

removed PIConditionLock, use PIMutex instead

lib/main/core/pistringlist.h

@@ -83,6 +83,7 @@ public:
 	PIStringList & operator =(const PIStringList & o) {PIDeque<PIString>::operator=(o); return *this;}
 
 	PIStringList & operator <<(const PIString & str) {append(str); return *this;}
+	PIStringList & operator <<(PIString && str) {append(str); return *this;}
 	PIStringList & operator <<(const PIStringList & sl) {append(sl); return *this;}
 
 };