Properly implement CloudRecipeBook.isAvailable().
In Recipe, exclude isPublished from json only

Allow it to be serialized by making it non-transient.
Add working SearchActivity implementation.
Make SearchActivity pull queries from its Intent.

Also add some comments to SearchActivity.java
Center search results placeholder.
Implement case-insensitive search in SimpleRecipeBook.
Fix small bugs in CloudRecipeBook.

 * save cache after adding to it (was a TODO)
 * return an empty array instead of null if we have
	no results.
Fix bug: forgot to assign query results to member