Adds basic 'conventions' doc to top-level of project
Updates CONTRIBUTING.md to refer to conventions.asciidoc
Revises tracing recipe for style and new conventions
Merge pull request #131 from jcromartie/conventions

Adds basic 'conventions' doc to top-level of project
Merge #126
Copy editing of a few recipes on maps and sets

Most of these changes are for conciceness and clarity. The net effect
is fewer lines with more examples.
Merge remote-tracking branch 'upstream/master'
Rescope for adding more features of the lib

refs #126
Rename because of scope change
Add example for streaming
Reformat library name
Add footnote for Twitter OAuth key retrieval
Merge pull request #133 from codebrickie/twitter-pr

Work on Twitter recipe
One line per "use" call
Example output for user-stream
Merge pull request #134 from codebrickie/twitter-pr

Minor changes
Prefer single-use of use
Merge remote-tracking branch 'upstream/master'

Conflicts:
	network-io/twitter-status-update/twitter-status-update.asciidoc