Standing desk post

Kullmann asked me to write this, I swear! I labeled it as belonging to the "etc" category.

TLDR: Sitting is bad for you, standing is great, and building your own desk is very hard work but worth it in the end.

I kept this as a separate commit because I wasn't sure what the group consensus would be. I don't personally think this one is worth worrying about, considering the entire dependency is one gem, I've just reverted the commit.