Smaller Tests - make avoidNonLinks test smaller. One assert per test.

[jarofgreen]

This makes it easier to deal with failures.

Before, if the first line in the data file failed, none of the subsequent lines would run. Now every line will always run, and you can get clear output of which ones passed and which ones failed!

If you approve, this could be applied to the other tests to.

[jarofgreen]

The Travis failure is PHP 5.3 problem that would be fixed by #25