methods#

Contraceptive methods

Idea:: A method selector should be a generic class (an intervention?). We want the existing matrix-based method and the new duration-based method to both be instances of this.

Classes

`Method`
`ContraPars`
`ContraceptiveChoice`
`RandomChoice`	Randomly choose a method of contraception
`SimpleChoice`	Simple choice model where method choice depends on age and previous method.
`StandardChoice`	Default contraceptive choice module.

Functions

`make_methods`
`make_method_list`
`make_contra_pars`	Shortcut for making a new instance of ContraPars