Duct Tape

Stick paper to things!

![tapelol](https://cloud.githubusercontent.com/assets/6357112/5261342/8cd42870-7a7d-11e4-8354-5e257f04a328.png)

How to use:
- Click paper with tape roll
- Click with (taped) paper where you want to stick it

How to remove:
- Click paper to pick it up
- Click paper in hand to remove tape

More uses to come in future, but figured I might as well put a PR up to add it to the code base (this has been sitting in my local repo for about 4 months).

I did prototype fixing damaged walls with tape, but reverted it since it seemed a bit gimmicky.
You'll want to use Adjacent() instead of in_range(), otherwise you'll be able to stick tape on things through windows. Well, you would, but since you're using afterattack that's [already taken care of](https://github.com/Baystation12/Baystation12/blob/master/code/_onclick/click.dm#L130) for you. So instead what you want to be doing here is checking the proximity flag, which you should probably rename to ```proximity_flag``` since ```flag``` is pretty non-descriptive.