Add new articles/restructure

- Add "The Grinch of Perl 6: A Practical Guide to Ruining Christmas"
- Add "A Primer to New, Readable Perl 6 Regex Syntax"
- Move "Perl 6 Is My Drummer: Making Grammars Sing" after the primer to regexes

misc/perl6advent-2017/schedule

@@ -1,11 +1,11 @@
 Please add your topic and name after each day that you plan to take.
 
- 1: Zoffix: "Perl 6 Is My Drummer: Making Grammars Sing"
+ 1: Zoffix: "The Grinch of Perl 6: A Practical Guide to Ruining Christmas"
  2: moritz: "Perl 6 Books"
  3: JJ: "Literary Ops with Perl6"
  4: tbrowder: "Adventures in NQP Land: A Tale of Tattered Tables"
- 5:
- 6:
+ 5: Zoffix: "A Primer to New, Readable Perl 6 Regex Syntax"
+ 6: Zoffix: "Perl 6 Is My Drummer: Making Grammars Sing"
  7:
  8:
  9: