move magento_list_order to magento_show_last_order
reflect rename.
add bin helper to ease cli tool development.
require bin_helper and in help refer to dynamically asigned program name
expose base_uri attribute of mech.
ease from_config Mech generation by looking for symbols _and_ strings in hash.
implement MagentoMech#last_orders
pre-release version bump (0.2)