fix developer CI page titles
add "|" around branch name to match other one
fix list punctuation
explain "on hold" GH issue label
simplify discussion of scc dependencies in Python
change "scc" style
stopgap solution suggested by @hflynn
fix typo
Merge pull request #368 from rleigh-dundee/cpp-cleanup-dev44

Cpp: Correct content and markup
index.txt: Correct typos on landing page.
Merge pull request #456 from mtbc/ci-titles

Adjusted titles of continuous integration developer pages
Merge pull request #261 from rleigh-dundee/xelatex-pdf

Generate PDF using XeLaTeX
merge dev_4_4 -D org -I include -E exclude: PR 455 (Clean up testing.txt)
merge dev_4_4 -D org -I include -E exclude: PR 463 (Fix typos on landing page)