Hierarchical mode

[chris-y]

Experimental hierarchical mode has a few known issues:

• Archive requires entries for directories
• These directory entries need to be immediately ahead of their contents

Fixes for these:

• Fake directory entries
  • Attempted this but didn't really work, and definitely would have failed upon encountering a file suddenly two levels deep.
• Sort archive contents
  • Sort order needs fixing as a normal alphabetical sort (locale/Strncmp) puts dir.info between dir and the contents of dir (resulting in dir which is expandable but has no contents, and the contents either hidden or in a disconnected leaf state)
• xad v12 does not mark some directories as directories, instead they are files ending in '/'
  • I did fix this but have disabled it as it was causing other problems when I was testing under xad v13.

[chris-y]

Previous commit attempts to sort '/' above all other characters, although I'm getting entries randomly sorted into the wrong places, so there is a bug in this function (beyond one I've already fixed).

[chris-y]

Rethinking this. Might be better to scan the entire archive and work out the directory structure, rather than expecting the files to be in a sensible order. This will pick up when folders are implied.

Scan
Create directory structure including files <-- this is the stage we're missing
Move directory structure into list view