Make moveit_warehouse_save_as_text save the queries as well as the scenes.
Address stylistic issues in moveit_warehouse_save_as_text.
Prevent creating queries files for scenes that have no queries.
Some more ints -> std::size_t for loop indexes.
Merge pull request #170 from ibrahima/save_queries_as_text

Make moveit_warehouse_save_as_text save the queries as well as the scenes