Updated education in URL to lowercase.
Merge branch 'develop' of https://github.com/runeandersen92/SkemaSystem into develop
Changed LessonBlock: use SubjectDistBlock as link to Subject and Teacher (low coupling).
Merge branch 'develop' of https://github.com/runeandersen92/SkemaSystem into develop

Conflicts:
	SkemaSystem.Tests/Features/ServiceTest/ServiceTest.cs
Fixed tests (all pass).