added: setting a correct mime type for static files - using magic library

added: std::wstring file_mime_type to ItemContent - a mime type for static file
added: Header (core/header.h) - there will be header names defined, at the moment only content_type
added: FuncionsBase::Finish() - it is called at the end when the winix finishes

winixd/core/request.h

@@ -49,8 +49,8 @@
 #include "textstream/textstream.h"
 #include "outstreams.h"
 #include "models.h"
-
 #include "models/winixmodel.h"
+#include "header.h"
 
 
 namespace Winix