This PR allows the user to pass an optional filename argument#3846

hansmannj wants to merge 2 commits intohakimel:masterhakimel/reveal.js:masterfrom

hansmannj:feat_pass_presentation_file_name_as_cmd_line_argumenthansmannj/reveal.js:feat_pass_presentation_file_name_as_cmd_line_argumentCopy head branch name to clipboard