[SalesForce] retrieve an Email Alert via the Ant Migration Tool

Moving out of your Packaging Org. You will eventually reach a point where what you have extract is a unmanaged version of your package contents, which can be made to be compatible with a subsequent deployment back to your packaging org, which i'm guessing is what you have later in mind? I have done this before, when I've out grown developing in a packaging org, but rather I've done it with a view to populating a source control system and using that as the central definition of truth for my app.

Developer Workflow from Source Control. You can still use your sandbox orgs for your developers, but have them deploy using the Salesforce Migration Toolkit from your source control system. When your ready you can do a deploy to your packaging org from source control.

Validating Source Control Contents. Note that you can extend this to a continue integration build approach and effectively use the test deploy aspect of the toolkit to confirm your current state of source control is compatible with your packaging org (without actually committing to it until your ready).

To deploy a Search Layout, you must deploy the CustomObject itself. All not-required tags can be stripped, but there is no way to simply deploy a search layout without the object.

This means you'd need something like this:

package.xml:

<?xml version="1.0" encoding="UTF-8"?>
<Package xmlns="http://soap.sforce.com/2006/04/metadata">
  <types>
    <members>Account</members>
    <name>CustomObject</name>
  </types>
  <version>35.0</version>
</Package>

objects/Account.object:

<?xml version="1.0" encoding="UTF-8"?>
<CustomObject xmlns="http://soap.sforce.com/2006/04/metadata">
    <enableEnhancedLookup>true</enableEnhancedLookup>
    <enableFeeds>true</enableFeeds>
    <enableHistory>false</enableHistory>
    <searchLayouts>
       <!-- as per description in the documentation -->
    </searchLayouts>
    <sharingModel>Private</sharingModel>
</CustomObject>