codegram/spinach — pull request #103 by ywen (2012-05-10 04:48:11+00:00)
Title: Add step_denfinitions in the on_tag hook

## Purpose

Sometimes I may want to call a method, do something about the
step_definitions in the on_tag hook.

Also since every other hook has ```step_definitions```, so it is fair to have ```on_tag``` to have it