Load issue comments.

Property definitions

github $ Loader :: get_issue_comments
	# Load issue comments.
	private fun get_issue_comments(job: LoaderJob, issue: Issue) do
		if config.no_comments then return
		var api = config.wallet.api
		for comment in api.get_issue_comments(job.repo.full_name, issue.number) do
			comment.repo = job.repo
			issue_comments.save comment
		end
	end
lib/github/loader.nit:362,2--370,4