Add function to ensure some birthday minimum date
Add function to compare birthdays by date
Add store method to load occasions from some date
List upcoming occasions
Merge pull request #22 from sebn/upcoming-birthdays

Upcoming birthdays
Fix broken closing tag
Quick and dirty fix for completion list

Follow-up to 371aa36761b561af73847c20e90bff25c1167d2c
Merge branch 'master' into change-birthday-date

Conflicts:
	app/core/birthdays.js
	test/core/app.test.js
	test/core/birthdays.test.js