Cybernetic limbs [Review this/Suggest improvements]

Forum thread:
http://www.ss13.eu/phpbb/viewtopic.php?f=10&t=1774
Contains a lot of information there.

Some things to note:
<del> Healing Robotic limbs with medical items still displays the message (does not heal though, as intended) assistance here would be nice </del> - Fixed, Wooo
- Masks, cannot be covered in blood, due to a null.len but I'm not sure this is to do with this (I tested this on non augmented people and it still runtime'd) - Information on whether this is me or something else would be cool - Still not sure on what the heck this is, might just go mental on a clean codebase and see if I can recreate the issue.

Any improvements, little fixes I can do etc. would be awesome, suggesting alternates to what I have done are welcome.
the first commit has a nice list of things included in it, the second was a test leftover than I fixed.

Feels good to have this *done*

Credits to:
- Miauw (He will claim he did nothing but he was still helpful)
- Dalmationer for the Sprites
- Coderbus whenever I asked for assistance
- Mrperson for being a huge help on how to do this