1. Changed signatures for extensions methods for System.Uri class ("parameters" argument from IEnumerable<KeyValuePair<string, string>> to object).
2. Added new extension methods.
3. Renamed several extension methods for domain classes.
4. Changed type of AuthorId propery for domain classes from System.String to System.Int64 to match new type of Id property.
5. Removed constructors that accepted IDictionary<string, object> from domain entities classes.
6. Removed ObjectExtensions.And/Or/Not methods.