added support for two new ezc statements for clearing/trimming text nodes

[ezc clear_all_white_nodes "yes"]...[end] - will clear a text node if the text consists of only white characters
[ezc trim_text_nodes "yes"]...[end] - will trim text nodes (removes white characters at the beginning and at the end)

"yes" is assumed by default if not present, also "no" can be specified to change the behavior

src/generator.h

@@ -2441,7 +2441,15 @@ template<class StreamType>
 void Generator<StreamType>::MakeTextEzc(Item & item)
 {
 	if( item.function.name == L"frame" )
+	{
 		MakeEzcFrame(item);
+	}
+	else
+	if( item.function.name == L"clear_all_white_nodes" || item.function.name == L"trim_text_nodes" )
+	{
+		// text nodes are already cleared/trimmed by PatternParser
+		MakeTextContainer(item);
+	}
 
 	// in the future we can use more builtin functions
 }