stats.csv: rename cases.active.todate to cases.active

[lukarenko]

We have now added estimated recovered, closed (recovered+deceased) and active cases.

• cases.confirmed.todate
• cases.recovered.todate = cases.confirmed.todate(today) - cases.confirmed.todate(-21days)
• cases.closed.todate = cases.recovered.todate + state.deceased.todate
• cases.active = cases.confirmed.todate - cases.closed.todate

As cases.active is is current (today's) state, we should remove wrong .todate suffix.

Note: as this fields were not used much before, we do not expect any breakage.

[lukarenko]

@MihaMarkic, we need to rename it first in REST.

[mkadunc]

@lukarenko cases.closed.todate je narobe v tekstu zgoraj. Moralo bi bit closed.todate = recovered.todate + deceased.todate
(Predlagam da kar popravis comment.)

Se komentar - invariante za active (ne vem, če kaj pomaga):

recovered.todate === recovered.active
deceased.todate === deceased.active
closed.todate === closed.active
closed.todate === recovered.todate + deceased.todate
confirmed.todate === recovered.active + confirmed.active + deceased.active
hospital.active = hospital_regular.active + icu.active
confirmed.active = nonhosp.active + hospital_regular.active + icu.active

[lukarenko]

Old cases.closed.todate removed