Added a voice announcement system for the AI.
Voices are based on /vg/'s female voice and are copyright free.
There is a 60 second cooldown for each announcement.
Added a compile option for AI voices. Undefining AI_VOX will not compile the resources, meaning players won't have to download them.
The AI's vocal announcement will also make a Request Console style announcement with the text of the message.
 * Removed the text announcement. It wouldn't work if the AI used the sound effects.
Adds missing "wood.ogg"
Merge pull request #1 from JJRcop/wood-ogg

Adds missing "wood.ogg"
Removed follwing silence from sound samples

I KILL YOU, SILENCE
Merge pull request #2 from JJRcop/silence-i-kill-you

THIS IS THE DAY SILENCE DIES
* Added a changelog entry for it.
The doppler array will now state the theoretical size of the explosion, which is the size of the explosion if there were no bomb cap.
Merge branch 'master' of https://github.com/tgstation/-tg-station into ai_vox_boogaloo
Merge pull request #1662 from Giacom/doppler_array_tweak

The doppler array will now state the theoretical size of the explosion if it was uncapped.
Removed the HL sound effects.
Made period and comma sounds completely silent, and turned them Vorbis
Merge pull request #3 from JJRcop/comma-period-silence

Background sound removed from period and comma sounds, also they are now Vorbis
 * Removed the deleted files from vox_sounds.dm
Merge pull request #1658 from Giacom/ai_vox_boogaloo

Added a voice announcement system for the AI. [CHANGELOG]