Merge pull request #61 from xeenon/add-name-keys

Add the `name` and `short_name` prose.

index.bs

@@ -67,7 +67,9 @@ This key must be present.
 
 ### Key `name`
 
-This key must be present.
+Name of the extension used in the browser’s user interface. This should be the full name used to identify the extension. See also [`short_name` key](#key-short_name).
+
+This key must be present. This property can be localized.
 
 ### Key `version`
 
@@ -167,7 +169,9 @@ This key may be present.
 
 ### Key `short_name`
 
-This key may be present.
+The short name of the extension. This value should be used in contexts where [`name`](#key-name) is too long to use in full. If `short_name` is not provided, manifest consumers should use a truncated version of `name`.
+
+This key may be present. This property can be localized.
 
 ### Key `sidebar_action`