(#201) Working around bug in Chocolatey

Looks like there is an issue here:

https://github.com/chocolatey/chocolatey/blob/master/src/helpers/functions/Uninstall-ChocolateyPackage.ps1#L51

The $file parameter is never passed into the call to msiexec, so it never knows which msi to call.

ChocolateyPackage/chocolateyUninstall.ps1

@@ -13,7 +13,12 @@ try {
 
 	$file = $properties.LocalPackage
 
-	Uninstall-ChocolateyPackage $packageName $fileType $silentArgs $file -validExitCodes $validExitCodes
+	# Would like to use the following, but looks like there is a bug in this method when uninstalling MSI's
+	# Uninstall-ChocolateyPackage $packageName $fileType $silentArgs $file -validExitCodes $validExitCodes
+
+	# Use this instead
+	$msiArgs = "/x $file $silentArgs";
+	Start-ChocolateyProcessAsAdmin "$msiArgs" 'msiexec' -validExitCodes $validExitCodes
 
 	Write-ChocolateySuccess $package
 }