Update Asciidoc man page.
Update README.md and two Asciidoc man pages. Remove the options and examples section in README.md.
- Add man page for compton-trans in Asciidoc format. - Add description of --use-ewmh-active-win to compton man page.
Add Asciidoc man pages. The old man page is still kept, and you need to run "make docs" to generate the new man pages and a HTML version of it. An Asciidoc man page for compton-trans is not added yet.