minor text repairs
Processed remarks by Edward Welbourne
Processed ESR's remarks
Processed esr's remarks up to chapter 14
Processed esr's remarks up to ch. 11
Processed esr's remarks up to ch. 8
Implemented ESR's suggestions up to ch. 5
processing received comment
7.0.0. Updated release tag (changelog wasn't updated yet)
Removed superfluous CHANGELOG