Add trip summary page / section

[greghutch]

include the following kind of information:

• status changes throughout the trip
• nav status changes through the trip
• eta vs ata
• number of deviations (ie times off route from nav status)

value judgements

• was this a valid trip (ie had all the expected pieces [ie a pickup + dropoff]
• average speed / max speed
• distance travelled
• total dwell time