- Revised "What is Nomad" copy
- Added "Key Features" section with links to task drivers & device plugins with lift-and-shift from README
- Added "Who Uses Nomad" section with users, talks, blog posts
- Removed Hadoop YARN, Docker Swarm, HTCondor from comparisons
- Revamped Guides section
- Inserted "Installing Nomad", "Upgrading", "Integrations" as persistent in Guides navbar
- Split Installing Nomad into two paths for users (one for Sandbox with "Quickstart", one for Production)
- Surfaced "Upgrading" and "Integrations" section from documentation
- Changed "Job Lifecycle" section into "Deploying & Managing Applications"
- Reworked "Operations" into "Operating Nomad"
- Reworked "Security" into "Securing Nomad"
- Segmented Namespaces, Resource Quotas, Sentinel into "Governance & Policy" subsection
- Reworked "Spark integration" into its own "Analytical Workloads" section
* navigation and initial steps of guide
* generate certs with appropriate token
* configure Nomad to use TLS
* add cli keys and certs
* add server gossip encryption section
* fix mislabeled steps
* vault paths formatting
* remove bit about cert revocation
* add clarification in challenge that we will be securing an existing Nomad cluster
* add some comments to consul-template.hcl to help user walk through it
* clarifying comments for CLI certs templates
* reorganize steps, change permissions on certs, and sub pkill command with systemctl reload nomad
* correct step reference
* add rpc upgrade mode instructions
* correct typo
