Bind All Existing `Virus` Functions

[IsaccBarker]

These consist of the following:

• [ ] mutate
• [ ] set_mutation
• [ ] get_sequence
• [ ] set_sequence
• [ ] set_agent
• [ ] set_date
• [ ] get_date
• [ ] get_id
• [ ] get_prob_infecting
• [ ] get_prob_recovery
• [ ] get_prob_death
• [ ] get_incubation
• [ ] post_recovery
• [ ] set_post_recovery
• [ ] set_post_immunity
• [ ] set_prob_infecting_fun
• [ ] set_prob_recovery_fun
• [ ] set_prob_death_fun
• [ ] set_incubation_fun
• [x] set_prob_infecting
• [x] set_prob_recovery
• [x] set_prob_death
• [x] set_incubation
• [x] set_name
• [x] get_name
• [x] set_state
• [ ] set_queue
• [ ] get_state
• [ ] get_queue
• [x] print
• [ ] distribute
• [x] set_distribution

[IsaccBarker]

I tried assigning this to a milestone but it keeps not saving; I'll try again tomorrow assuming this is an error with GitHub.

@IsaccBarker