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

core/image.cpp

@@ -545,10 +545,7 @@ void Image::SaveImage()
 			{
 				// it doesn't matter for us if there is an error when chmod/chown on a file
 				// the admin (root) will correct it
-				std::string dst_patha; // IMPROVE ME temporary -- in the futere there'll be SetPriv() with std::wstring
-				PT::WideToUTF8(dst_path, dst_patha);
-				SetPriv(dst_patha, config->upload_files_chmod, config->upload_group_int);
-
+				SetPriv(dst_path, config->upload_files_chmod, config->upload_group_int);
 				ImageSavedCorrectly();
 			}
 			else