Replace Jake with Metalsmith/gulp; convert content to Markdown

Includes the following changes:
- Tag synonyms now appear in index.html.
- Per-page TOC and "related links" (formerly "see also") sections are now autogenerated.
- Minor content and formatting changes on numerous pages.

Author: hegemonic

Diff for: .eslintrc

@@ -0,0 +1,135 @@
+{
+    "env": {
+        "node": true
+    },
+
+    "rules": {
+        // Possible errors
+        "no-cond-assign": 2,
+        "no-console": 0,
+        "no-constant-condition": 0,
+        "no-comma-dangle": 2,
+        "no-control-regex": 2,
+        "no-debugger": 2,
+        "no-dupe-keys": 2,
+        "no-empty": 2,
+        "no-empty-class": 2,
+        "no-ex-assign": 2,
+        "no-extra-boolean-cast": 2,
+        "no-extra-parens": 0,
+        "no-extra-semi": 2,
+        "no-func-assign": 2,
+        "no-invalid-regexp": 2,
+        "no-negated-in-lhs": 2,
+        "no-obj-calls": 2,
+        "no-regex-spaces": 2,
+        "no-sparse-arrays": 2,
+        "no-unreachable": 2,
+        "use-isnan": 2,
+        "valid-jsdoc": [2, { "requireReturn": false }],
+        "valid-typeof": 2,
+
+        // Best practices
+        "block-scoped-var": 0,
+        "complexity": 0, // TODO: enable
+        "consistent-return": 2,
+        "curly": [2, "all"],
+        "dot-notation": 2,
+        "eqeqeq": [2, "smart"],
+        "guard-for-in": 2,
+        "no-alert": 2,
+        "no-caller": 2,
+        "no-div-regex": 2,
+        "no-else-return": 0,
+        "no-empty-label": 2,
+        "no-eq-null": 2,
+        "no-eval": 2,
+        "no-extend-native": 2,
+        "no-fallthrough": 2,
+        "no-floating-decimal": 2,
+        "no-implied-eval": 2,
+        "no-labels": 2,
+        "no-iterator": 2,
+        "no-lone-blocks": 2,
+        "no-loop-func": 2,
+        "no-multi-str": 2,
+        "no-native-reassign": 2,
+        "no-new": 2,
+        "no-new-func": 2,
+        "no-new-wrappers": 2,
+        "no-octal": 2,
+        "no-octal-escape": 2,
+        "no-proto": 2,
+        "no-redeclare": 2,
+        "no-return-assign": 2,
+        "no-script-url": 2,
+        "no-self-compare": 2,
+        "no-sequences": 2,
+        "no-unused-expressions": 2,
+        "no-warning-comments": 0,
+        "no-with": 2,
+        "no-yoda": 2,
+        "radix": 2,
+        "wrap-iife": [2, "inside"],
+
+        // Strict mode
+        "no-global-strict": 0,
+        "no-extra-strict": 2,
+        "strict": 2,
+
+        // Variables
+        "no-catch-shadow": 0,
+        "no-delete-var": 2,
+        "no-label-var": 2,
+        "no-shadow": 2,
+        "no-shadow-restricted-names": 2,
+        "no-undef": 2,
+        "no-undef-init": 2,
+        "no-unused-vars": 0,
+        "no-use-before-define": 2,
+
+        // Node.js
+        "handle-callback-err": 2,
+        "no-mixed-requires": 2,
+        "no-path-concat": 2,
+        "no-process-exit": 2,
+        "no-sync": 0,
+
+        // Stylistic issues
+        "brace-style": [2, "1tbsp"],
+        "camelcase": 2,
+        "consistent-this": [2, "self"],
+        "func-names": 0,
+        "func-style": 0,
+        "max-nested-callbacks": 0,
+        "new-cap": 2,
+        "new-parens": 2,
+        "no-nested-ternary": 0,
+        "no-array-constructor": 2,
+        "no-new-object": 2,
+        "no-spaced-func": 2,
+        "no-space-before-semi": 2,
+        "no-ternary": 0,
+        "no-underscore-dangle": 0,
+        "no-wrap-func": 2,
+        "one-var": 0,
+        "quotes": [2, "single", "avoid-escape"],
+        "quote-props": 0,
+        "semi": [2, "always"],
+        "sort-vars": 0,
+        "space-in-brackets": 0, // TODO: enable?
+        "space-infix-ops": 2,
+        "space-return-throw-case": 2,
+        "space-unary-word-ops": 2,
+        "wrap-regex": 0,
+
+        // Legacy
+        // TODO: consider enabling some of the `max-*` rules
+        "max-depth": 0,
+        "max-len": 0,
+        "max-params": 0,
+        "max-statements": 0,
+        "no-bitwise": 2,
+        "no-plusplus": 0
+    }
+}

Diff for: .gitattributes

@@ -1,10 +1,24 @@
-_site/*
-_theme_packages/*
+# Logs
+logs
+*.log
 
-Thumbs.db
-.DS_Store
+# Runtime data
+pids
+*.pid
+*.seed
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
 
-!.gitkeep
+# Compiled binary addons (http://nodejs.org/api/addons.html)
+build/Release
 
-.rbenv-version
-.rvmrc
+# Dependency directories
+bower_components
+node_modules
+
+# Dotfile detritus
+.DS_Store