Add impl GeckoStyleCoordConvertible for Either<A, B>
Add impl GeckoStyleCoordConvertible for Either<A, B>

ConnorGBrewster/servo,notriddle/servo,anthgur/servo,thiagopnts/servo,paulrouget/servo,cbrewster/servo,avadacatavra/servo,SimonSapin/servo,fiji-flo/servo,CJ8664/servo,saneyuki/servo,mattnenterprise/servo,CJ8664/servo,emilio/servo,emilio/servo,notriddle/servo,sadmansk/servo,cbrewster/servo,dati91/servo,avadacatavra/servo,notriddle/servo,jimberlage/servo,thiagopnts/servo,larsbergstrom/servo,fiji-flo/servo,thiagopnts/servo,canaltinova/servo,sadmansk/servo,ConnorGBrewster/servo,fiji-flo/servo,larsbergstrom/servo,canaltinova/servo,fiji-flo/servo,jimberlage/servo,canaltinova/servo,peterjoel/servo,larsbergstrom/servo,KiChjang/servo,emilio/servo,notriddle/servo,paulrouget/servo,mattnenterprise/servo,larsbergstrom/servo,szeged/servo,mattnenterprise/servo,dati91/servo,dsandeephegde/servo,dati91/servo,upsuper/servo,dsandeephegde/servo,larsbergstrom/servo,thiagopnts/servo,SimonSapin/servo,peterjoel/servo,SimonSapin/servo,canaltinova/servo,pyfisch/servo,emilio/servo,pyfisch/servo,szeged/servo,CJ8664/servo,paulrouget/servo,dati91/servo,mbrubeck/servo,canaltinova/servo,szeged/servo,notriddle/servo,splav/servo,szeged/servo,nnethercote/servo,emilio/servo,mbrubeck/servo,sadmansk/servo,mbrubeck/servo,upsuper/servo,cbrewster/servo,nnethercote/servo,ConnorGBrewster/servo,DominoTree/servo,jimberlage/servo,jimberlage/servo,thiagopnts/servo,cbrewster/servo,dsandeephegde/servo,anthgur/servo,ConnorGBrewster/servo,saneyuki/servo,peterjoel/servo,nnethercote/servo,dati91/servo,pyfisch/servo,emilio/servo,anthgur/servo,canaltinova/servo,peterjoel/servo,eddyb/servo,KiChjang/servo,splav/servo,dati91/servo,paulrouget/servo,KiChjang/servo,mattnenterprise/servo,paulrouget/servo,rnestler/servo,nnethercote/servo,eddyb/servo,canaltinova/servo,avadacatavra/servo,eddyb/servo,ConnorGBrewster/servo,cbrewster/servo,avadacatavra/servo,SimonSapin/servo,mbrubeck/servo,pyfisch/servo,rnestler/servo,upsuper/servo,mattnenterprise/servo,DominoTree/servo,eddyb/servo,thiagopnts/servo,upsuper/servo,peterjoel/servo,ConnorGBrewster/servo,KiChjang/servo,KiChjang/servo,DominoTree/servo,pyfisch/servo,pyfisch/servo,sadmansk/servo,splav/servo,rnestler/servo,emilio/servo,KiChjang/servo,jimberlage/servo,peterjoel/servo,sadmansk/servo,KiChjang/servo,rnestler/servo,splav/servo,thiagopnts/servo,mbrubeck/servo,paulrouget/servo,upsuper/servo,sadmansk/servo,splav/servo,KiChjang/servo,eddyb/servo,rnestler/servo,mattnenterprise/servo,dati91/servo,pyfisch/servo,mattnenterprise/servo,CJ8664/servo,nnethercote/servo,rnestler/servo,saneyuki/servo,pyfisch/servo,sadmansk/servo,fiji-flo/servo,anthgur/servo,upsuper/servo,KiChjang/servo,dsandeephegde/servo,emilio/servo,cbrewster/servo,saneyuki/servo,larsbergstrom/servo,mbrubeck/servo,CJ8664/servo,szeged/servo,rnestler/servo,DominoTree/servo,saneyuki/servo,cbrewster/servo,splav/servo,saneyuki/servo,jimberlage/servo,anthgur/servo,notriddle/servo,szeged/servo,dsandeephegde/servo,canaltinova/servo,peterjoel/servo,dsandeephegde/servo,paulrouget/servo,saneyuki/servo,DominoTree/servo,CJ8664/servo,mbrubeck/servo,jimberlage/servo,saneyuki/servo,splav/servo,avadacatavra/servo,nnethercote/servo,emilio/servo,jimberlage/servo,paulrouget/servo,DominoTree/servo,avadacatavra/servo,fiji-flo/servo,SimonSapin/servo,avadacatavra/servo,mbrubeck/servo,avadacatavra/servo,notriddle/servo,notriddle/servo,anthgur/servo,splav/servo,DominoTree/servo,larsbergstrom/servo,upsuper/servo,paulrouget/servo,CJ8664/servo,peterjoel/servo,notriddle/servo,mattnenterprise/servo,larsbergstrom/servo,pyfisch/servo,ConnorGBrewster/servo,peterjoel/servo,ConnorGBrewster/servo,DominoTree/servo,pyfisch/servo,thiagopnts/servo,emilio/servo,sadmansk/servo,paulrouget/servo,fiji-flo/servo,rnestler/servo,anthgur/servo,saneyuki/servo,notriddle/servo,peterjoel/servo,szeged/servo,SimonSapin/servo,KiChjang/servo,nnethercote/servo,saneyuki/servo,larsbergstrom/servo,nnethercote/servo,jimberlage/servo,DominoTree/servo,dati91/servo,dsandeephegde/servo,upsuper/servo,eddyb/servo,splav/servo,larsbergstrom/servo,DominoTree/servo,szeged/servo,anthgur/servo,nnethercote/servo,splav/servo,SimonSapin/servo,fiji-flo/servo,SimonSapin/servo,eddyb/servo,cbrewster/servo,szeged/servo,nnethercote/servo,CJ8664/servo,szeged/servo,eddyb/servo,dsandeephegde/servo