Add tests

[notori0us]

There are no tests in this project. Some basic unit test coverage, plus integration test coverage would be nice, assuming I want people other than me to contribute.

Also considering this is used by people, it probably matters.

[notori0us]

added model validation tests, as well as two functional tests around creating events, and another for testing the welcome page. I also added some fixtures to generate test data, though I don't use it.

Still to do:

• Integration test
• Mailer test
• Functional test for get all logs

[notori0us]

Cool, completely threw away my previous work. Now: Did feature test, now model/controller to do.

Also adding fixtures using factory_bot

inspiration here: https://robots.thoughtbot.com/how-we-test-rails-applications