website: add more info to the file provisioner page

website/source/docs/provisioners/file.html.markdown

@@ -6,7 +6,10 @@ layout: "docs"
 
 Type: `file`
 
-The file provisioner uploads files to machines build by Packer.
+The file provisioner uploads files to machines built by Packer. The
+recommended usage of the file provisioner is to use it to upload files,
+and then use [shell provisioner](/docs/provisioners/shell.html) to move
+them to the proper place, set permissions, etc.
 
 ## Basic Example
 
@@ -23,9 +26,9 @@ The file provisioner uploads files to machines build by Packer.
 The available configuration options are listed below. All elements are required.
 
 * `source` (string) - The path to a local file to upload to the machine. The
-  path can be absolute or relative. If it is relative, it is relative to the 
-  working directory when ?Packer is executed.
+  path can be absolute or relative. If it is relative, it is relative to the
+  working directory when Packer is executed.
 
-* `destination` (string) - The path where the file will be uploaded to in the 
-  machine. This value must be a writable location and any parent directories 
+* `destination` (string) - The path where the file will be uploaded to in the
+  machine. This value must be a writable location and any parent directories
   must already exist.