PICout::withExternalBufferAnd decomposed to PICout::withExternalBufferAndID and PICout::withExternalBufferAnd

PIString::toPercentageEncoding/fromPercentageEncoding
piStringify()
PIHTTPClient support arguments
some doc

libs/main/application/pilog.cpp

@@ -179,7 +179,7 @@ PICout PILog::makePICout(PIObject * context, Level cat) {
 		if (context->name().isNotEmpty()) *buffer += " \"" + context->name() + "\"";
 		*buffer += "] ";
 	}
-	return PICout::withExternalBuffer(buffer, id_by_cat.value(cat), PICoutManipulators::AddSpaces);
+	return PICout::withExternalBufferAndID(buffer, id_by_cat.value(cat), PICoutManipulators::AddSpaces);
 }