VV now allows read-only stuff without edit perm

Also removes links you do not have permissions to use
Oops
Oh that's how it works
Final pass
Cleaning up
Reverted links getting disabled when client lacks permissions for them
Refactored throw_at
v2.0
Changes damage overlay threshold from 10 and on to 35 and on
- Changes the damage overlay thresholds so they start displaying when you are a bit more damaged than currently. There are six damage overlays, their thresholds used to be 10-25; 25-40; 40-55; 55-70; 70-85; 85-infinity. This change sets them to 35-45; 45-55; 55-65; 65-75; 75-85; 85-infinity. (The thresholds are the sum of fireloss, bruteloss and the hit indicator variable)
- Oxyloss overlay left unchanged, since you pass out at 50 or something, so you need the visual cue quicker.

Main reason for this proposed change is that I feel the overlays kick in too quickly. I think it'd be good to leave a little room, so you don't get an overlay as soon as the first moron boops you over the head with his crowbar.
Moved Speech Modification via masks to masks. say and whisper now call the speechModification(message) proc in wear_mask.

Moved derpspeech modification to mob_helpers.dm
Put this in the right place
Building arcade machines now works
Personnelly, I feel this pull request was successfull.
Spelling fixes.
Gives the chicken suit head some hiding flags
The chicken suit helmet now has the same inv_flags as a xeno helm.
Changes the initialism for stat collecting on summon magic to SU because SM was taken by smoke. On the stat page this will result in smoke being overreported until a full month after this change has been live on both servers.

For judgement purposes you can probably assume that nearly all "smoke" spells on the stat page are actually summon magic, because who the hell takes smoke?
Merge pull request #2031 from Alek2ander/master

VV permissions check update, fixes #2009
Merge pull request #2183 from fleure/arcade

Building arcade machines now works
Syringe guns will now work on aliens properly
Updated changelog for recent bugfixes
Improves logging on the bolt of change so admins can follow the paper trail of terrible mobs who get turned into other terrible mobs