complete implementation of EPP-ASM features

[jeffeaton]

• [ ] HIV positive 15 year old entrants

• [ ] 'Special population' ART eligibility

• [ ] Pregnant women ART eligibility

• [ ] EPP new infections models

  • [ ] R-spline
  • [ ] R-trend

• [ ] ART interruption CD4 category increase

  • Description: Spectrum (from a version around 2021) moves people who interrupt treatment up one CD4 category. Need to implement and validate against AIM