Merge pull request #129 from grasmash/default-alias-default-value

Adding a default value for drush.default_alias.

Author: grasmash

template/build/core/phing/tasks/properties.xml

@@ -21,5 +21,6 @@
   <phpVariable file="${repo.root}/drush/drushrc.php" variable="options[uri]" outputProperty="local_url" />
 
   <!-- Default drush alias. -->
+  <property name="drush.default_alias" value="self" override="false" />
   <property name="drush.alias" value="${drush.default_alias}" override="false" />
 </project>