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
Modified acknowledgments
Reworked Chapters 6 and 7
A handful of comments on 6 and 7.
Edits to Ch6 and Ch7
Fix typo: s/fro/from
Merge pull request #271 from alFReD-NSH/patch-1

Fix typo: s/fro/from
Revert - chars in code to _.

Also removed a spurious int-t (int_t) and made it simply int.
Merge pull request #272 from ehiggs/master

Reverted '-' characters to '_'.
Add }} to fix broken document references.