Added style guide, tweaked git workflow
Merge branch 'master' of https://github.com/hut6/dev-resources

# By Johan Douma (1) and ryancastle (1)
# Via ryancastle
* 'master' of https://github.com/hut6/dev-resources:
  Delete address-refactor-review.md
  Rename Hut6-osx-dev-setup.md to hut6-osx-dev-setup.md