Working on Ch8 logger
Fixed some errors in Chapter 4
Fixed diagrams in Chapter 8
More fixes the Chapter 8
A couple basic questions.
Removed abuse of 'load-balance'
Removed excessive adjectives
Finished Chapter 6, more on Chapter 8
Defined SASL properly
Some comments on late chapters, scattered through. Not finished
reading them.
Merge github.com:imatix/zguide
A few comments on later chapters; not finished reading them.
added time.sleep between subscription and REQ/REP sync
it is mentioned in the manual and is in the C example
Merge pull request #268 from AvdN/master

python example syncsub missing sleep()
Added README for Python example formatting rules
reformatted/reindent the python examples to conform
merged README with README.md
Merge pull request #269 from AvdN/master

reindentation of python files
removed two spurious accolades in pub-sub sync image
Merge pull request #270 from AvdN/master

Img for pub-sub incorrect
Removed generated files