Manually override the shrug emoticon to ignore escapes

[JimmyCushnie]

In most markdown renderers, if you want to use the shrug emoticon ¯\_(ツ)_/¯, you have to type it like ¯\\\_(ツ)_/¯ to fix the escape stuff. This is presently the case with FTR as well, though you can't see it in the demo because the demo doesn't have a japanese font installed. I hate this, and I want FTR to manually search for ¯\_(ツ)_/¯ and render it properly, no extra escapes needed. However the extra escaped version should also work for compatibility with users who are used to that.