GrahamA: start on exercise 5 - default methods. No test cases yet, just the introduction.
Begin adding first test case for default methods.
Add first completed unit test for default method chapter.
Add almost-finished test for overriding a default method in a class.
Change download location.
GrahamA: add instructions to test.
Add a test for overriding a default method in a sub-interface.
Commit accidentally missed files, fix #15.
Add a Travis CI build for master. Don't run tests as they're expected to fail.
Remove errant dash in readme.
Retrieve the build status icon for the correct branch.
Try out build status in another position.
Exercise 1