PIString::toFloat/Double/LDouble own fast implementation (. and , equivalent)

PICout ldouble support
PIEthernet small optimization

libs/main/core/pistring.h

@@ -869,9 +869,6 @@ public:
 	//! \~english Convert each character in copied string to lower case.
 	//! \~russian Преобразует каждый символ в скопированной строке в нижний регистр.
 	PIString toLowerCase() const;
-	
-	// TODO: doxygen
-	PIString toNativeDecimalPoints() const;
 
 
 	//! \~english Returns if string contains character "c".