Django-simple-graphql

- Added Schema.register_query method for registering queries
- Added Schema.graphql_query decorator for registering queries
- Improved logging of schema building errors

- Added GlobalIDInput graphene scalar
- Added Schema.register_mutation method for registering mutations
- Added Schema.graphql_mutation decorator for registering mutations
- Added `simple_graphql.auth` Django app with the following features:
- GraphQL middleware which can be used to authenticate queries based on the
HTTP authorization header
- Token model for maintaining authorized sessions
- Default login mutation implementation which is easy to take into use
- Added `require_login` model configuration, which will require all queries of
that model to be authenticated
- Added `DisableIntrospectionMiddleware` which can be used to disallow
introspection queries

- Removed global schema builder instance
- Removed global decorator for model registering to GraphQL schema
- Removed global function for model registering to GraphQL schema
- Added a decorator to schema builder instances which can be used to register
models to the schema
- Added a function to the schema builder instance which can be used to register
models to the schema
- Made the `SchemaBuilder.build_schema` return a lazy object instead of building
the schema immediately, as it can only be built after model imports have
fully finished
- Added a check ensuring the schema does not get additional entries once it has
been built
- Simplify schema declaration by allowing the schema object to be used for
registering models, as opposed to having to use a separate builder
- Added support for basic search
- Added support for ordering

- Initial release
- A single global schema instance where models can be registered
- The schema is declared in Relay-style (connections, edges, nodes)
- Enable GraphQL queries for Django models
- Enabling can be done via a decorator or a function call
- By default, includes the following queries:
- `getModelName` for getting a specific instance with an ID
- `listModelName` for listing model instances
- Adds a `graphql_node_name` field to model classes
- Adds a `graphql_id` property to models, which can be used to retrieve the
Global ID of a model instance.
- Configure by adding a `GraphQL` meta class to the model class
- Alternatively supply a configuration class to the decorator
- Also supports model-specific configuration via one of the following:
- A metaclass on the model class
- A configuration object passed in the register decorator or function
- Merge of the two (where paramter takes precedence)
- Supported configuration options
- `filters`: A `django-filter` compatible set of filters supported on the
model's QuerySet. List or a Dictionary.
- `exclude_fields`: A list of field names to exclude from the schema
- `search_fields`: A list of fields to perform search on
- `ordering_fields`: A list of fields that can be used to order results
- `default_ordering`: What ordering to use if none was specified
- `ordering_fields` and `search_fields` don't do anything yet