SickBeard - Additional installer code

- Complete uninstall script undoes configuration changes to SABNzbd
 - Use new WaitForSuccess helper
 - Wait for SickBeard to be accepting reqs before modifying config.ini
 - PATH and PYTHONHOME need to be set for MACHINE so that SABNzbd
can find python.exe as SYSTEM to call sabToSickBeard.py
 - Config files should always be written as UTF8 (not Unicode or ASCII),
 - However, AutoProcess.cfg cannot have UTF8 BOM, so saving as ASCII
 - Replacing 0.0.0.0 with localhost
 - Support cloning into an empty Sick-Beard dir under site-packages
 - Minor logging tweaks
 - Use Season folders when sorting files
 - Make sure to trash processed files

Sickbeard/tools/WaitForSuccess.ps1

@@ -0,0 +1,24 @@
+function WaitForSuccess([ScriptBlock] $script, [int]$seconds = 10,
+  [string]$description = 'operation to complete')
+{
+  $skip = $false
+  Write-Host "Waiting up to $($seconds)s for $description..."
+  $result = 0..($seconds * 2) |
+    % {
+      if ($skip) { return $true }
+      $status = &$script
+      if ($status -eq $true)
+      {
+        $skip = $true
+        return $true
+      }
+      else
+      {
+        Start-Sleep -Milliseconds 500
+      }
+      return $false
+    } |
+    Select -Last 1
+
+  return $result
+}