omit tests, unused settings and generated wsgi script from coverage report
add tests for caffeine.views.OnTheRunView
add tests for OnTheRunView and OnTheRunOldView
move datetime format for caffeine date into settings
add tests for caffeine.views.SubmitCaffeineView

- modify caffeine.views.SubmitCaffeineView and
  caffeine.views.SubmitCaffeineOnTheRunView to work with django-model-utils
- add caffeine.tests.test_views.SubmitCaffeineViewTest
add tests for caffeine.views.SubmitCaffeineOnTheRunView
add tests for DeleteCaffeineView

- refactor success message in caffeine.views.DeleteCaffeineView into module
  level constant DELETE_CAFFEINE_SUCCESS_MESSAGE
- add test class caffeine.tests.test_views.DeleteCaffeineViewTest
add tests for SelectTimeZoneView

- refactor success message from caffeine.views.SelectTimeZoneView into module
  level constant SELECT_TIMEZONE_SUCCESS_MESSAGE
- add caffeine.tests.test_views.SelectTimeZoneViewTest