Unify unix and windows versions of FileManager::UniqueDirContainer and FileManager::UniqueFileContainer

[Douglas Gregor]

Sent from my iPhone

> On Jul 31, 2013, at 7:34 PM, Rafael Espíndola <rafael.espindola at gmail.com> wrote:
> 
>> On 31 July 2013 17:08, Aaron Ballman <aaron at aaronballman.com> wrote:
>> Patch LGTM aside from a minor nitpick below, and Sean's previous
>> comments about PTH versioning.
> 
> Updated patches attached.

LGTM. 

> Douglas, is the PTH format change ok?

Yes, it's fine. We don't promise stability for the PTH format, and I've never heard of anyone depending on it for anything serious. 

  - Doug