[policy no patch] config save format and default yml file format and coding standards

Problem/Motivation

While getting drupal 8 ready, we need to have default config settings yml files, and we are making the saved active config files match in format so that a diff between them means that a change in configuration has actually happened. We dont want a diff to show a diff if the format is just different but the data is the same.

There is no coding standards for config yml yet.

Proposed resolution

Eventually make a standards doc page to put http://drupal.org/coding-standards

Remaining tasks

• Gather the conventions that are currently being used and document them.
• Discuss what the standard will be and link to related issues.

User interface changes

No UI changes.

API changes

No api changes.

Related Issues

• #1930226: Update integer/boolean values with quotes in configuration files. →
• #1938580: [META] Make active config save format match the default yml file (order and quotes) →
• #1602106: Document default configuration files →
• #1653026: [META] Use properly typed values in module configuration →
• http://drupal.org/node/1905070#codestyle (schema standards)