[gollem] backend configurable header displays

[Liam Hoekenga]

>> I've written a patch that will (should?) allow you to configure
>> which columns Gollem displays in the file manager on a per backend 
>> basis.
>> Useful if you're using a VFS backend that doesn't conform to the
>> attributes used to describe a traditional UNIX file system, or simply 
>> if
>> you just don't want to display one of the columns.

I would like to change it so the file system attributes could be more 
flexible (mainly, I'd like to see ACL support.. we'll be using this 
against AFS, but Solaris's UFS, NTFS, etc have the concept of "ACLs" 
that extend beyond the traditional unix permission scheme).. but 
this'll do for now.

Liam