Make zoom test pass
Fix comment
Change comment
Merge pull request #196 from rjwright/ZoomInterpTest

Make zoom interp test pass
Border width and flex interp tests working
Make orphans interp test pass
Remove printline
Make widows interpolation test pass
Remove FIXME
Remove duplicate handler for widows
Merge pull request #197 from rjwright/BorderWidthInterpTest

Make border-width, flex, orphans and widows tests pass.
Make orphans interp test pass
Make widows interpolation test pass
Make text-shadow interp test pass
clean up after merge