Merge pull request #300 from mtbc/encoding

Add note about UTF-8 source code files. (rebase)
Addressing ticket 10531 & fixing random typo
Fixes as per JM's suggestions & headings levels
Implementing new rules for bullet point lists
Final tidying of Sessions.txt
Making unix version consistent re: bullet list
merge develop -D org -I include -E exclude: PR 302 (Addressing ticket 10531 & fixing random typo (rebased onto develop))