default_content 2.0.0-alpha1

This is the start of the new 2.x branch and has the following improvements over the 8.x-1.x version. This new version is however still experimental and might missing some 8.x-1.x features, specifically extensibility and integrations through hal+json normalizers.

• A more compact, custom YAML-based normalization format
• Identifiers like ID, revision id, changed and revision timestamps and other fields are no longer exported
• Built-in support for composite entities like paragraphs in a single file
• User 0/1 are no longer exported but referenced by ID
• Support for translations
• Support for files (stored as files in the same folder as the normalized file enitties, filename must be unique)
• Support for entity references in link fields
• Improved support for path fields including the pathauto skip flag

Importing of hal_json based default content is still supported, but exporting can only be done in the new format. Support for the old format will be removed in a future version.