Interval contains its lower bound
adjust comment spacing
unit test Interval.contains
unit test Interval.overlaps
unit test Task constructor
unit test Task.isScheduled
enable cglib for mocking of non-interface types

c.f., stackoverflow.com/questions/25338200/cannot-create-mock-for-class-loginservice-mocking-of-non-interface-types-requir
unit test Task description property
unit test Task schedule property
unit test Task priority property
unit test Task status property

tasx-5