add scaffold for trips
make trips conform to jsonapi
use respond_with
some cosmetic fixes
add scaffold for friends
add meetings
remove scaffolding
add active_model_serializers
display exceptions in json format
disable csrf for api calls
disable wrap_parameters for the json
accept friends when create trips
accept arrays of strings for phones and emails
accept array of numbers for timeslots
rename times to timeslots
switch trips to/from to datetime
include meetings and their friend in the trips json
enable storing a location hash in meeting
make extra initializers for trips with nested meetings
use the full serializer for meetings too