objective-c: Is not build in CI and does not follow the repository template

[mpkorstanje]

🤔 What's the problem you've observed?

Currently Objective-C is not build in CI and does not fully implement the acceptance test suite.

Compare:

gherkin/objective-c/Makefile

Lines 28 to 29 in 2455438

	.compared: .built $(TOKENS)
	#.compared: .built $(TOKENS) $(ASTS) $(ERRORS)

Against:

gherkin/java/Makefile

Line 42 in 2455438

acceptance: .built $(TOKENS) $(ASTS) $(PICKLES) $(ERRORS) $(SOURCES) ## Build acceptance test dir and compare results with reference

This is a problem because:

As of May 2016 Gherkin is implemented in 8 languages. This number is likely to increase to a dozen within a year or two. Very few programmers are intimate with all those languages. Therefore, in order to make it as easy as possible to refactor, fix bugs, add features and release packages it is essential that all implementations have a similar structure.

CONTRIBUTING.md - consistency between implementations

✨ Do you have a proposal for making it better?

Either

• Remove objective-c from the list of supported implementations
• Fix the build process

📚 Any additional context?

The objective-c project was already not build in CI while in the common repo. I would be surprised if it even works.