Added currency to the distance model
Added a currency column to receipt database and linked it appropriately
Added a migration sql from trips to distance
Added Distance Dialog Fragment to distance page
Fixed some merge conflicts from changing data sets and added trip parcels to different distance objects
Added parent trip to allow relevant queries
Wired various distance functions together
Fixed a typo, addressed a nav bug, and added a distance total to the ActionBar subtitle
Added preferences for the different distance options