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/functions/functionbase.cpp

@@ -124,6 +124,13 @@ void FunctionBase::Init()
 }
 
 
+void FunctionBase::Finish()
+{
+	// this method is called only once at the end
+	// when winix finishes
+}
+
+
 bool FunctionBase::HasAccess()
 {
 	// true by default