Avoid hardcoding full paths for Jekyll and Sphinx.
The `/usr/local/bin/` softlink isn't necessary.
Fail fast in site.yml.
Use mon_email and mon_pagerduty.
mon_pagerduty is undefined, not false.
Refactoring nginx role config into vars.yml.
Merge pull request #750 from rackerlabs/full-jekyll-path

Avoid hardcoding full paths for Jekyll and Sphinx.
Merge pull request #798 from rackerlabs/fail-without-explicit-monitoring

Fail fast without an explicit monitoring setup.
Install emacs and vim.
Refactoring deployment region variable into vars.yml.
Add deployment region to infrastructure names.
Generate blog categories under /blog/categories (instead of default /categories).
Rewrite /categories URLs to /blog/categories URLs.
Merge pull request #843 from ycombinator/install-editors

Install emacs and vim.
Merge pull request #844 from ycombinator/better-named-infra

Better named infra
Merge pull request #845 from ycombinator/fix-blog-categories-path

Fix blog categories path
Resolving conflicts.
Resolving conflicts.
Merge pull request #842 from ycombinator/refactor-nginx-config

Refactoring nginx role config into vars.yml
Merge pull request #846 from rackerlabs/dev

Merging infrastructure changes from dev -> master