Plugin API: Hook missing for the templates

I've started to develop the new clue plugin using the [plugin API](https://github.com/Hackademic/hackademic/blob/gsoc2013/docs/) (#41) from last summer GSoC.

In order to display the clues to the students I need to change the template for the view which displays the challenge (normally [showChallenge.tpl](https://github.com/Hackademic/hackademic/blob/next/view/showChallenge.tpl)). I can't find a hook in the plugin API to do this.

I had the same need with the admin views ([editchallenge.tpl](https://github.com/Hackademic/hackademic/blob/next/admin/view/editchallenge.tpl) for example) and the hook `set_admin_view_template` solved it quite easily.

I just need to know if it's really missing or if I missed something. Or maybe there is a reason for that. @span Any insight on this?
If it's just missing I can add it. If I follow the way it's done for the admin views it shouldn't be difficult :)