Code that should've been fully async that was not previously actually async, such as the networking code, is now actually async. This makes it much easier to read and means that it makes a lot more sense in the context of the program. This also means that all uses of DispatchQueue.main.sync{} and DispatchQueue.main.async{} are now gone.
DetailView's fetching code benefitted the most from these changes, and is now just one iterative function instead of two cursed functions involving callbacks. As a result, you can now also pull down on the detail view to refresh the data, which is handy. Note that occupancy isn't updated when doing this currently due to a task issue I haven't figured out yet, but you can just go back out and in to update that anyway.
ContentView will also now automatically refresh the data if the last refreshed date is no longer today, so if you let the app sit in the background and then focus it, dates should automatically update to being for today.
The app was previously not checking if the current day of the week was within the list of weekdays that the regular opening schedule was valid for. This lead to the app frequently claiming a location was open on the weekend when it wasn't, which burned me personally several times. I've gone to like 4 locations this weekend under the assumption they were open because my own app said so, and finally I was like "hey maybe this isn't the data being bad and I've messed something up" and lo and behold, I did. Oops.
Also removes the middleman API call to get the MDO ID from the main location ID, as I realized the location info from TigerCenter actually includes the MDO ID already. This simplifies the code for getting the occupancy of a location by a good bit and just makes me happy.
The details page for a location now shows an indicator of how busy a location is based on data from the RIT maps API, which kindly offers the current and maximum occupancies for locations around campus. This is displayed the same way that the RIT website displays it, with 0-5 person icons that are filled in based on the percentage occupied the location is. This API can be *really* slow sometimes, so this data is fetched indepdently of the main load, because it could end up massively slowing down the app to not display the main info until after the occupancy data loads. A small spinner is used to indicate that occupancy data is loading, and the indicators are partially transparent until the data is loaded.
Also fixed a bug where locations with multiple opening periods could have exceptions for the same time period, resulting in duplicated time slots. Thanks Brick City Cafe! This is fixed by making sure that times are not already present in the openTimes/closeTimes arrays before adding them.
