Last date to nowcast

[lsbastos]

Need to check the last date in the dataset and the last date in the nowcast estimates. It seems they don't match properly.

[rafalopespx]

The issue is the default configuration for the package is to calculate the maximum amount of cases within the maximum amount of epidemiological weeks, this is done by the workhorses data.w and data.w_no_age and subsequent calculations inside the workhorse nowcasting_inla, a solution is to give a parameter that can flag which kind of week specification is being used, is it using epiweek or taking the date in a standard manner for weeks.

• [ ] logical parameter epiweek at nowcasting_inla, with default TRUE for epiweek usage

[rafalopespx]

Fixed at #44