~kb/open-notes

Fix formatting
Fix bad links
Update now page
Add stub for coxswain cert
Add notes on People Matters course
Sync minor ammendments in local notes
Update trig notes
Authn notes
Fix missing line break
CM1015 midterm WIP
CM1015 midterm WIP
CM1015 midterm WIP
CM1015 midterm WIP
CM1015 midterm WIP
CM1015 midterm WIP
CM1015 midterm WIP
CM1015 midterm WIP
CM1015 midterm WIP
CM1015 midterm WIP
CM1015 midterm WIP
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