Adding PowerShell script to clean the solution folder, fixes #2810

CleanSolution.ps1

@@ -0,0 +1,43 @@
+<#
+.Synopsis
+   Cleans the solution: removes all bin and obj folders under src, deletes Dependencies, cache.dat and all mappings.bin files from App_Data.
+   Just run the script where it is, don't move or run elsewhere.
+
+.EXAMPLE
+	PS> .\CleanSolution.ps1
+
+#>
+
+# Deleting bin and obj folders.
+$currentPath = (Get-Item -Path ".\").FullName
+# Add relative file paths here what you want to keep.
+$whiteList = @("\src\Orchard.Azure\Orchard.Azure.CloudService\Orchard.Azure.WebContent\Bin\Startup\SetIdleTimeout.cmd")
+# Also add the bin/obj folder's path of the paths in the whiteList here. This is needed for performance reasons, the script will run faster this way.
+$whiteListFolders = @("\src\Orchard.Azure\Orchard.Azure.CloudService\Orchard.Azure.WebContent\Bin")
+
+Get-ChildItem -Path ($currentPath + "\src\") -Recurse | 
+Where-Object { $PSItem.PSIsContainer -and ( $PSItem.Name -eq "bin" -or $PSItem.Name -eq "obj") } | 
+ForEach-Object {
+	if($whiteListFolders.Contains($PSItem.FullName.Substring($currentPath.Length)))
+	{
+		Get-ChildItem -Path $PSItem.FullName -Recurse -File |
+		ForEach-Object {
+			if(!$whiteList.Contains($PSItem.FullName.Substring($currentPath.Length)))
+			{
+				Remove-Item $PSItem.FullName -Force
+			}
+		}
+	}
+	else
+	{
+		Remove-Item $PSItem.FullName -Recurse -Force
+	}
+}
+
+# Deleting Dependencies and cache.dat from App_Data.
+Remove-Item -Path ($currentPath + "\src\Orchard.Web\App_Data\Dependencies\") -Recurse -Force
+Remove-Item -Path ($currentPath + "\src\Orchard.Web\App_Data\cache.dat") -Force
+
+# Deleting all mappings.bin files from App_Data.
+Get-ChildItem -Path ($currentPath + "\src\Orchard.Web\App_Data\Sites") -Recurse -Include "mappings.bin" |
+Remove-Item -Force