smaller files, by section and sub-section.
Also extensive editing up through section 7. Sections 6.2, 8, and
beyond definitely need work. Other polishing is also desirable, and
maybe also some additions and/or changes.
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@3656 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
