https://bz.apache.org/bugzilla/show_bug.cgi?id=62194

(the web is no longer frame-friendly…)

This closes #57 pull request at github/apache/ant repo

reviewed use of multiple-choice attributes and definition of “unix” (see conditions)

also, loose is mostly used as an adjective

uniform style of notes and new feature markers

- stripped trailing whitespace;
- corrected the tag soup;
- corrected Java versions (1.4 followed by 5);
- stripped inline styling (use CSS for uniformity).