This also adds files missing in last commit

Using a `shapes_storage` instance will now always calculate and store
shapes and shape offsets.

This will remove warnings about possibly unused functions in defined
function objects.

This will also prepare the data set for multiple tests using a common
timetable.

Notice that the connection stop will be processed twice for now.

Stops connecting multiple trips in a journey leg will no longer be
merged. This will slightly improve code readability without having a
notible effect for most data sets.
Furthermore, it will support GTFS data sets that may use different
coordinates for stops connecting multiple trips.

Fix offset, as 'stop_range_' is inclusive while 'range' is exclusive

This is only applied for data types that are based on unsigned integers

This reverts commit 99da3ed.

Notice that using `end(interval)` will attempt to use `frun::end()`
instead.

wip