Ticket simpleidserver#67 : Fix PATCH add operation

Fix NUGET configuration

Ticket simpleidserver#48 : AttributesList != null && AttributeList.Any()

Ticket simpleidserver#47 : Fix duplicate nested attributes

Merge remote-tracking branch 'origin/release/1.1.5'

Use version 1.1.4

Ticket ## : Fix the build

Ticket simpleidserver#30 : Fix extension method

Ticket simpleidserver#26 : Return groups

Ticket simpleidserver#25 : Set SchemaId and RepresentationId