add timeslots resources
include users helper on app controller
add Chronic gem
add timeslot model
ad migration, schema and seed
add new files for timeslot
Merge branch 'master' of https://github.com/sebabelmar/sitter into Timeslots
add timeslot new views
add index link to timeslot new
Merge pull request #3 from sebabelmar/Timeslots

Timeslots