update start stop button when car is selected
Merge branch 'refactor-outsource-matthes' of https://github.com/matthesrieke/enviroCar-app into develop
remove old db classes
add year to car object

made a singleton to handle one car object
Merge branch 'develop' of https://github.com/enviroCar/enviroCar-app into develop
Merge pull request #140 from janschulte/develop

add singleton car object