Added simple performance benchmark script.
Added simple performance benchmark script.

On my machine (MacBook Air, 1.3 GHz Intel Core i5, 4GB 1600 MHz DDR3):

./dotnet/bin/gherkin-generate-ast
910
./go/bin/gherkin-generate-ast
9
./java/bin/gherkin-generate-ast
167
./javascript/bin/gherkin-generate-ast
50
./ruby/bin/gherkin-generate-ast
13.392

SabotageAndi/gherkin,pjlsergeant/gherkin,thetutlage/gherkin3,araines/gherkin3,Zearin/gherkin3,chebizarro/gherkin3,araines/gherkin3,cucumber/gherkin3,SabotageAndi/gherkin,vincent-psarga/gherkin3,moreirap/gherkin3,amaniak/gherkin3,amaniak/gherkin3,hayd/gherkin3,moreirap/gherkin3,pjlsergeant/gherkin,dirkrombauts/gherkin3,thiblahute/gherkin3,chebizarro/gherkin3,curzona/gherkin3,curzona/gherkin3,thetutlage/gherkin3,SabotageAndi/gherkin,cucumber/gherkin3,curzona/gherkin3,moreirap/gherkin3,hayd/gherkin3,dg-ratiodata/gherkin3,Zearin/gherkin3,pjlsergeant/gherkin,concertman/gherkin3,Zearin/gherkin3,Zearin/gherkin3,Zearin/gherkin3,SabotageAndi/gherkin,thiblahute/gherkin3,chebizarro/gherkin3,araines/gherkin3,pjlsergeant/gherkin,pjlsergeant/gherkin,moreirap/gherkin3,curzona/gherkin3,hayd/gherkin3,dirkrombauts/gherkin3,cucumber/gherkin3,vincent-psarga/gherkin3,thiblahute/gherkin3,thiblahute/gherkin3,concertman/gherkin3,thiblahute/gherkin3,thetutlage/gherkin3,thetutlage/gherkin3,cucumber/gherkin3,chebizarro/gherkin3,dirkrombauts/gherkin3,curzona/gherkin3,araines/gherkin3,thiblahute/gherkin3,dg-ratiodata/gherkin3,araines/gherkin3,dirkrombauts/gherkin3,moreirap/gherkin3,thetutlage/gherkin3,cucumber/gherkin3,cucumber/gherkin3,thetutlage/gherkin3,dirkrombauts/gherkin3,chebizarro/gherkin3,dg-ratiodata/gherkin3,hayd/gherkin3,chebizarro/gherkin3,pjlsergeant/gherkin,thetutlage/gherkin3,vincent-psarga/gherkin3,thiblahute/gherkin3,amaniak/gherkin3,SabotageAndi/gherkin,chebizarro/gherkin3,dg-ratiodata/gherkin3,moreirap/gherkin3,amaniak/gherkin3,Zearin/gherkin3,hayd/gherkin3,Zearin/gherkin3,dg-ratiodata/gherkin3,hayd/gherkin3,dg-ratiodata/gherkin3,SabotageAndi/gherkin,dirkrombauts/gherkin3,araines/gherkin3,thetutlage/gherkin3,vincent-psarga/gherkin3,vincent-psarga/gherkin3,concertman/gherkin3,curzona/gherkin3,dirkrombauts/gherkin3,cucumber/gherkin3,amaniak/gherkin3,thiblahute/gherkin3,amaniak/gherkin3,pjlsergeant/gherkin,moreirap/gherkin3,pjlsergeant/gherkin,hayd/gherkin3,SabotageAndi/gherkin,vincent-psarga/gherkin3,dg-ratiodata/gherkin3,vincent-psarga/gherkin3,SabotageAndi/gherkin,SabotageAndi/gherkin,concertman/gherkin3,chebizarro/gherkin3,araines/gherkin3,moreirap/gherkin3,concertman/gherkin3,Zearin/gherkin3,dg-ratiodata/gherkin3,concertman/gherkin3,amaniak/gherkin3,concertman/gherkin3,pjlsergeant/gherkin,hayd/gherkin3,concertman/gherkin3,araines/gherkin3,vincent-psarga/gherkin3,cucumber/gherkin3,amaniak/gherkin3,curzona/gherkin3,curzona/gherkin3,dirkrombauts/gherkin3,cucumber/gherkin3