Fix IOpacity protocol implementation for Element. Fixes #56.
Fix IOpacity protocol implementation for Element. Fixes #56.

Checks both getOpacity and get getComputedStyle.

tapn2it/one,pandeiro/multiedit,nybbles/one,simonholgate/contour-one,saolsen/jammer-old,jasonrudolph/one-rep-max,osbert/dv-sim,osbert/dv-sim,jasonrudolph/one-rep-max,huntfunc/huntfunc-one,saolsen/jammer-old,tapn2it/one,simonholgate/contour-one