Add initial version of schema specification site

After running the util/generate_docs.py script to parse and extract
the metadata term specifications and their controlled vocabularies,
we use Hugo to generate the HTML site. The HTML site uses Bootstrap
with several ISEAL brand colors gleaned from the corporate website.

site/content/terms/resource-scope-sustainability-outcome/index.md

@@ -0,0 +1,9 @@
+---
+title: 'Scope - sustainability outcome'
+field: 'is.focus.sustainOutcome'
+slug: 'resource-scope-sustainability-outcome'
+description: 'select from control list'
+required: False
+vocabulary: 'resource-scope-sustainability-outcome.txt'
+policy: 'Controlled value. Multi select from control list.'
+---

site/content/terms/resource-scope-sustainability-outcome/resource-scope-sustainability-outcome.txt

@@ -0,0 +1,33 @@
+Access to credit and finance
+Access to health care
+Child education
+Child labour
+Child rights
+Climate adaptation
+Climate change
+Deforestation and degradation
+Fish stocks and bycatch
+Food security and nutrition
+Forests and ecosystems
+Free prior and informed consent
+Freshwater and oceans
+Gender and women
+GHG emissions
+Health and safety
+Health and wellbeing
+Indigenous peoples and community rights
+Land tenure
+Livelihoods
+Living income
+Pesticides, fertilizers, and antibiotics
+Plant and wildlife conservation
+Premiums
+Productivity, efficiency, and yield
+Revenue, income, profitability
+Smallholders
+Soil erosion and health
+Training
+Wages / living wage
+Water quality and quantity
+Water, sanitation, and waste disposal
+Workers' rights