In README add subtitles for different examples of usage

...as it is difficult to read and lacks structure.

For instance, the first example could be entitled "Install WordPress with installation parameters". The third one could be "Install WordPress with self update", and so on.

Note: remove text "Include three to five examples of the most important or common tasks a user can accomplish with your module. Show users how to accomplish more complex tasks that involve different types, classes, and functions working in tandem."