Semantic file system - Vitis

[Dejan Lekic]

Fantastic!

We currently can set/get attributes on Linux with setfattr:

```
# Attach tags
setfattr -n user.tags -v "green,tree,autumn" green-tree.png

# Read tags back
getfattr user.tags green-tree.png

# List all attributes on a file
getfattr -d green-tree.png
```

We can even search with help of grep:

```
# Find all tagged files matching "autumn"
grep -l autumn $(getfattr -R -n user.tags --only-values /path 
2>/dev/null; echo)
```

But your FS makes it so much easier! I will definitely give it a 
try on my Fedora workstation!