changed: now we do not use std::string and char* in the Winix API

everywhere we are using std::wstring and wchar_t*
         (std::string and char* is used only locally in some places
         especially when creating a path to OS file system etc.)
added:   to the special thread when winix closes:
         a write function for curl: FetchPageOnExitCurlCallback()
         without this function the curl library will print
         the page's content to the standart output
changed: TextStream<> class from core can make
         UTF8<->wide strings conversions
removed: from config: utf8 option
         now winix expects UTF8 from the user's input (html forms, url-es)
         and outputs strings in the UTF8 format




git-svn-id: svn://ttmath.org/publicrep/winix/trunk@965 e52654a7-88a9-db11-a3e9-0013d4bc506e

plugins/export/exportthread.h

@@ -55,7 +55,6 @@ public:
 
 	ExportThread();
 
-	void SetUTF8(bool use_utf8);
 	void SetBaseUrl(const std::wstring & url);
 
 	void AddMessage(const Message & message);
@@ -72,7 +71,6 @@ private:
 	std::string url_a;
 	std::string buffer;
 	size_t buffer_read_index;
-	bool utf8;
 	std::wstring base_url;
 
 	std::string browser_name;