Adds ci rake task and improves documentation [#69591798]

- Removes integrations specs from the default rake task as they are destructive to the host machine.
- Introduces ci task that includes integration specs that Travis runs
- Adds missing readme entry for Rubocop
- Fills in Attributes and Recipes sections
Adds some reasonable rubocop exceptions [#69591798]

- Increase line length to 120 characters as itis often usefule to keep long
  shell comands on the same line.  Also we often nest node properties fairly
  deeply
- Disables multiline block warnings