(report) hospital patient check-in report

[jniles]

After the work done by @sfount to create a patient check-in implementation (#477), we now have a database with patient checkin data. The next step is to develop a report that effectively communicates what this data means.

Hospital Patient Check-In Report
I propose we create a "Hospital Patient Check-in" report that shows the number of patient check-ins over time for the entire hospital. Technical design:

1. Show maximum of one year at a time.
2. Group patient checkins by day, week, month, or quarter.
3. The report should be available as either a table or a graph, but never both at the same time.

This will add another report that can validate that our application is behaving properly.

[jniles]

I'll take a first look at this implementation.