Migrating adamdjbrett.com to version 2.0

2.0

Switching to the Swiss theme by @broccolini
- I loved Moon by @taylantatli but it was time for a refresh.
Atom, RSS, Sitemap, robots.txt, humans.txt by @Phlow
to exclude pages form navigation in the swiss theme use these instructions from tahirtaous.
- you must change navigation in two places:
  - _includes and update header.html
  - _layouts and update home.html
Set up yamlCV by @AnotherKamila
Add image gallery from Jekyll Codex
modified post_block.html to use {{ post.excerpt }} instead of { post.content | strip_html | truncatewords:30 }}