[COOK-3988] Don't unescape URI before constructing it, but unescape it while constructing the file cache's filename.
Merge pull request #63 from juliandunn/COOK-3988

[COOK-3988] Don't unescape URI before constructing it.
Version bump to 1.12.8
Publish 1.12.8 Changelog
Version bump to 1.12.9 (for development)
[COOK-3715] - Unable to create a startup task with no login

Signed-off-by: Sean OMeara <someara@opscode.com>
[COOK-4188] - Add powershell_version method to return Powershell version

Signed-off-by: Sean OMeara <someara@opscode.com>
Version bump to 1.30.0
Publish 1.30.0 Changelog
Version bump to 1.30.1 (for development)
[COOK-4172] Replace 'powershell' with 'powershell_script' resource
Add an note to the readme about 'generic' errors

Errors returned by Set-WmiInstance are incredibly not helpful. Point
to the most likely culprit.