Add info box for Maya and / or Houdini

[nstandif]

Shelf tools currently only give you user information about assets when you attempt to checkout something that is already checked out.

Implement a shelf tool in Maya and / or Houdini to give information on an asset without having to check out the file.

[eestrada]

It looks like this is mostly done. The last thing to implement is getting info for a particular lighting file in Houdini. We may just do without this though.