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

db/dbconn.cpp

@@ -65,7 +65,7 @@ PGconn * DbConn::GetPgConn()
 
 
 
-void DbConn::SetConnParam(const std::string & d, const std::string & u, const std::string & p)
+void DbConn::SetConnParam(const std::wstring & d, const std::wstring & u, const std::wstring & p)
 {
 	db_database = d;
 	db_user     = u;