v0.4.0

• Improved error handling with new MalformedDocumentError and NetworkError classes.
• SolidEngine now exposes metadata of the documents it reads through SolidEngineListener.
• Added usingSameDocument method in SolidHasManyRelation.
• Exposed model document info through getDocumentUrl, getSourceDocumentUrl, etc.
• Improved some internal interactions with the Solid server to use best practices (use describedBy header for containers, remove reserved container properties, and create documents with relative urls instead of absolute).

Breaking changes

• soukai dependency has been updated to 0.4.0.
• Refactored the way to store multiple models in a single document. Read the docs.