The following worked fine in the Julia v0.3.5 REPL run with admin 
privileges on Win8.1 x64:
julia> Pkg.update()
julia> Pkg.add("WAV")
julia> Pkg.checkout("WAV")
julia> Pkg.pin("WAV")
julia> Pkg.free("WAV")
The problem occurred when I tried this:
julia> Pkg.rm("WAV")
I got an error saying the unlink operation is not permitted.  I retried 
after closing and rerunning the REPL with no improvement.  I manually 
removed the WAV package from the REQUIRE file and executed this:
julia> Pkg.resolve()
Same problem.
Now, when new package version are available at GitHub, the update fails 
because the WAV package cannot be unlinked.

Do I need to execute another command to make the unlink in Git work?  Or is 
this a bug in Julia v0.3.5?  I plan to upgrade to v0.3.7 when the next 
build of WinPython is available.

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