nds4droid release 39

Just pushed a minor release for nds4droid, so grab it on Google Play and sourceforge. Just some bug fixes to the new ROM browser, they are:

• Fixed a bug that would cause the new ROM browser to crash on some devices
• Added a progress dialog explaining that the app is searching for ROMs
• If no ROMs are found on the external storage, the file browser will now automatically pop up
• Added a Dutch translation (thanks Fl4ilinat0r)

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