Add support for OLElink streams

[farfilli]

With my low knowledge of Structured Storage files, I came to these two assumptions:

• Streams with EntryInfo.Name starting with the character /u0005 are OleProperties
• Streams with EntryInfo.Name starting with the character /u0001 are OleLinks

There is a third one I found that is /u0003 that is OleLinkInfos

I can extract those streams and by parsing them extract the link to the file however I'm doing it in a brute way; I wonder if this data has a specific format and perhaps be able to extract them directly with a specific function

Attached a Word document containing a link to an excel document
oleLINK.zip