Allow isLowContrast() to take a tolerance factor, and pass in tolerance=0.02 from the LowContrastElements audit rule
Add more tests for color contrast; switch to rounding to nearest 0.1 instead of using a tolerance value
Switch AuditRule to take an options object rather than several optional arguments, and allow setting a maximum number of results
Remove extraneous extra argument to isLowContrast() in LowContrastElements.js
Merge pull request #56 from alice/master

Round colour contrast when checking for low contrast; allow configuration of maximum number of results for audit rule