Fixes being able to have alien species hair on humans or other species.
Experimentally readding Delete Book verb.
Allow all mobs to emote. Standardising emote proc.
Fixes admins not spawning as aliens on roundstart.
Uncomments Space Law book content.
Merge pull request #3562 from Mloc/master

Removes alien virus.
Revert "Experimentally readding Delete Book verb."

This reverts commit ec3000ecfb2609cbcc5116169aa640e1d89815b5.
Better gender checks.
Merge pull request #3561 from Erthilo/master

Fixes, emotes, books
Tweaked gitignore.
Species will no longer draw hair not allowed for them.  Mirrors will no longer let you choose disallowed hair styles.