Added stub for contentInMeaningfulSequence.
Added contentPositioningShouldNotChangeMeaning to G57.
Added tableLayoutMakesSenseLinearized
Added test for whitespace used for meaning.
Added test for quail.languageDirectionPunctuation
Fixed search for start/stop punctuation.
Upped node version.
Fixed yaml typo.
Formatted test file.
Changed to regex for splitting br tags.
Merge branch 'dev' into 91-meaningful-sequence

Signed-off-by: J. Renée Beach <splendidnoise@gmail.com>

Conflicts:
	.travis.yml
Conflict with remove-saucelabs branch.
Merge pull request #236 from quailjs/91-meaningful-sequence

91 meaningful sequence