Nhse o34 orkv.i87 spellcheck (OpenRiak#107)

Add spell-checker on PR, and fix the spelling errors it has discovered.

Requires an extensive, bespoke wordlist. This has been categorised to try and ease management for the future.

Author: martinsumner

.github/workflows/spellcheck.yml

@@ -0,0 +1,16 @@
+name: spellcheck
+
+on:
+  pull_request:
+    branches:
+      - openriak-3.4
+
+jobs:
+  spellcheck:
+    name: runner / spellcheck
+    runs-on: ubuntu-latest
+    steps:
+    - name: Check out code.
+      uses: actions/checkout@v2
+    - name: Run PySpelling as a GitHub action
+      uses: sbates130272/spellcheck-github-actions@v0.6.0

.spellcheck.yaml

@@ -0,0 +1,19 @@
+spellchecker: aspell
+matrix:
+- name: markdown
+  aspell:
+    lang: en
+    d: en_GB
+    mode: markdown
+    ignore-case: true
+  sources:
+  - 'docs/*.md'
+  pipeline:
+  - pyspelling.filters.markdown
+  dictionary:
+    wordlists:
+    - wordlist.txt
+    output: wordlist.dic
+    encoding: utf-8
+  default_encoding: utf-8
+  expect_match: true