Add missing cmd_open_file.h file in last commit

src/app/commands/cmd_open_file.h

@@ -0,0 +1,37 @@
+// Aseprite
+// Copyright (C) 2016  David Capello
+//
+// This program is distributed under the terms of
+// the End-User License Agreement for Aseprite.
+
+#ifndef APP_COMMANDS_CMD_OPEN_FILE_H_INCLUDED
+#define APP_COMMANDS_CMD_OPEN_FILE_H_INCLUDED
+#pragma once
+
+#include "app/commands/command.h"
+
+#include <string>
+#include <vector>
+
+namespace app {
+
+  class OpenFileCommand : public Command {
+  public:
+    OpenFileCommand();
+    Command* clone() const override { return new OpenFileCommand(*this); }
+
+    const std::vector<std::string>& usedFiles() const { return m_usedFiles; }
+
+  protected:
+    void onLoadParams(const Params& params) override;
+    void onExecute(Context* context) override;
+
+  private:
+    std::string m_filename;
+    std::string m_folder;
+    std::vector<std::string> m_usedFiles;
+  };
+
+} // namespace app
+
+#endif