migrate templating engine to Hugo

[skippy]

They offer some nice extensions, esp for this issue: golang/go#10608

it is difficult to handle common cases like if no services are running, do this. Nested variables can solve that, along with a few other common cases (e.g. a running counter of up or down services).

I don't know if I'm asking for the moon here or not, but there it is :)

[sethvargo]

Dupe of #447, please watch that issue. Thanks!

[skippy]

good call! Thank you sir!