Error checking for event model
Also some whitespace fixes in the test file, and adding a missing getter test
Fix documentation so that it refers to Redis, and not MongoDB
no message
Rename method to get API url to mark as attending
adding some onboarding instructions to the about page
making the dates display in comments
Merge branch 'clairs-event-model-error-checking'
Merge branch 'clairs-doc-update-redis'
Merge branch 'master' into clairs-cleanup-event-model and handle
conflicts between multiple changes on the same code

Conflicts:
	tests/Model/EventTest.php
Merge branch 'clairs-cleanup-event-model'
Merge branch 'welcome' of github.com:lornajane/responsive into pr98
Merge branch 'pr98'
Merge branch 'JOINDIN-442' of github.com:lornajane/responsive into pr100
Merge branch 'pr100'