incidence2 0.2.0

• Fixes issue with monthly incidence objects when show_cases = TRUE (see #42).
• Additional checks added for assessing whether a manipulated incidence object maintains its class.
• Improved implementation speed.
• NA’s now ignored in the count variable of a pre-aggregated input to incidence function.
• Fixes axis labelling and spacing.

incidence2 0.1.0

• Initial release.