Integrate with gherkin3 parser

[tooky]

Gherkin3 is a brand new implementation and has some major differences to the current parser.

cucumber-core's compiler will eventually move into Gherkin3 and we will only need to deal with test cases. We want to modify the compiler here, in-place, before we extract to gherkin3.

ref cucumber/common#830
ref cucumber-attic/gherkin#12

[tooky]

closed in favour of #93

[lock]

This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.