Support for inline comments in tables

This adds supports for inline comments in tables. I've sometimes found the need to add extra information for other Gherkin authors for a particular table row, but currently it throws an error. For example:

	  | column1 | column2 | column3 |
	  | 1       | 1       | 1       |
	  | 2       | 2       | 2       | # extra comment
	  | 3       | 3       | 3       |