[MERGE] add win32utils.get_local_appdata_location()

[Mark Hammond]

> Just to mention, if I vote "BB:tweak" that means you don't have to
> submit a new patch, we just need to get another approval, and then
> whoever merges it can make the minor tweak.

I've been confused about this in the past, and last time I asked I was told
that tweak *does* mean I need to resubmit
(http://thread.gmane.org/gmane.comp.version-control.bazaar-ng.general/41091/
focus=41837)

The developers guide is also vague on this - it mentions another review
isn't necessary, but doesn't explicitly say who should apply the tweaks.
Maybe its worth updating those docs?

Cheers,

Mark