server: storage api for uploads
db: add reservation documents, tachometer, fuel
server/api: reservation update
client: very basic reservation finish
client: file upload with progress bar
client/finish: fuel state slider
client/finish: numeric keyboard for tachometer state
db: add reservation.finished_at
server/api: set finished_at
server/api: only non-finished reservations by default
client: build uploader and slider into the app bundle
client: update angular to 1.2.21
client: show phone numbers without +420
client/existing: show no reservations label
finish: show car/customer info
client: show hand cursor on labels