Update eisvogel.tex to support optional twosided

[AaronNGray]

Hi, I have an issue. I am trying to get pandoc-latex-template to support odd and even pages.

Here's the mods I have done so far :-

I have added a optional generation of '\documentclass[twoside]' from a twosided flag.

https://github.com/AaronNGray/pandoc-latex-template/commits/master/

I am wanting odd and even page footers to have the page number on the outside edge of the page footers.

[Wandmalfarbe]

Two-sided documents are already supported out of the box. You just have to pass the option twoside as a classoption e.g., in the YAML metadata block:

classoption: [twoside]

I have added the example twoside to show how a two-sided document can be produced. You can have a look at the example header-and-footer to create custom headers and footers that are automatically mirrored on even/odd pages.

Keep in mind that books are already twosided per default, so when using book: true you don't have to pass additional options. The book example in this repository uses the classoption oneside because I wanted a book, but the PDF should be for online consumption and not for printing.

[AaronNGray]

@Wandmalfarbe Many thanks !