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.
Merge pull request #833 from rackerlabs/master

Merging blog posts from master -> dev
Updating submodule commit hash.
Move IP whitelist into vault file.
Merge pull request #834 from ycombinator/vault-ip-whitelist

Move IP whitelist into vault file.
Moved a period to fix rendering. Fixes #835
Merge pull request #836 from alex/move-period

Moved a period to fix rendering. Fixes #835
Merge pull request #837 from rackerlabs/dev

Pushing to production after reviewing on staging
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.