Implemented test clock.
Merge pull request #72 from ezzatron/feature/test-clock

Implemented test clock.
Updated dependencies.
Bumped version and updated changelog.
PSR-4
Added TestClock to readme [ci skip]
Updated readme links to match PSR-4 change [ci skip]
Updated README.md [ci skip]
Try to eliminate ugly wrapping! [ci skip]
Merge branch 'release/0.4.0' into develop