Integrate k8s and EKS related bits into Thar

[jhaynes]

After investigation / discussion by @bcressey , @tjkirch , and @zmrow we've come up with the action items to make this happen:

• Investigate the minimum settings needed to make k8s run pods
• Add k8s settings to models in apiserver
• Build a tool to handle settings that need to be dynamically set at runtime (Sundog, implemented in Add Sundog to handle dynamic settings #49 )
• Build a "setting generator" program that knows how to fetch k8s related settings at runtime
• Add base64 decode helper to template library to render decoded base64 text