[Feature] Pathology Benevolent Symptom additions

[Podrick Equus]

https://github.com/goonstation/goonstation-2020/pull/28

Oxytocin Production (Tier 2 Symptom)

• Contagious (Hands/Body. This means only people that you are directly next to can be infected)
  
• Periodically injects the infected with Pure Love, forcing you to hug nearby people.
  
• What's this? You want to remain on harm intent? You're not a bad person, are you?
  
• Spread the love!
  
• Hint: "The pathogen's cells appear to be... hugging each other?"
  

Neuron Restoration (Tier 3 Symptom)

• Heals brain damage at a very slow rate.
  
• Assuming the microbody is a stage 5 virus, the pathogen has an 8% chance to heal two(2) brain damage per life loop.
  
• Hint: "The pathogen appears to have a gland that may affect neural functions."
  

Added hints for Senility and Leprosy.

Senility: "The pathogen appears to have a gland that may affect neural functions."
Leprosy: "The pathogen appears to be rapidly breaking down certain materials around it."

Removed Moaning (Tier 1 Symptom) and Hiccuping (Tier 1 Symptom)

• They are both completely useless symptoms.
  
• Doing pathology research should be approximately 30% faster with the number of Tier 1 Symptoms reduced to 6, down from 8.