Adds the remaining sections from [[ https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2019/p1614r2.html#clause-23-iterators-library | P1614R2 ]]

Adds the remaining sections from [[ https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2019/p1614r2.html#clause-23-iterators-library | P1614R2 ]] Some entries were reordered for easier tracking.

Adds the remaining sections from [[ https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2019/p1614r2.html#clause-23-iterators-library | P1614R2 ]] Some entries were reordered for easier tracking.