- support enums
- inherit interface members
- use normal jsii FQNs for package names to keep things simple

if an interface has non-serializable properties but they are
optional, we can technically allow users to use the construct
with the default value. this dramatically expands the set of
available deconstructs.

- performs type checking
- allows deserializing enums
- in the future will allow deserializing IBucket-like objects
-

if we see an Fn::GetAtt, we replace it with a synth-time lazy value
which will resolve according to what is referenced.

if GetAtt references a high level construct, the resolved value will
be the value returned by a named property. otherwise, we just retain
the original Fn::GetAtt.

at the moment, this is only supported for strings.

a new "resourceForPath(path)" method will get or create all
the resources leading to a certain path in the api model.

this can be used to easily define "routes" in the api and
reuse the nodes in the tree.

includes a refactor of how the root resource and normal resources
share implementation (through an abstract base class, dah!)

the ApiEventSource allows easily adding APIGW routes to a Lambda.
upon first call, a new REST API resource will be created, and then
routes will be added to it for each ApiEventSource associated 
with the lambda.

initial implementation for a declarative surface for serverless
functions, which is based on the SAM spec. the main difference
between this API and the Lambda API is that this allows defining
event sources declaratively when the function is initialized.

- ECS/Fargate: one resource that synthesizes 38
- Queue with KMS encryption with auto-created key
- SAM API events + dynamo table + GetAtt in Outputs
- SAM with Queues: shows GetAtt for both resource and construct

A script "./synth" instead of cdk.json

If a construct has a property that references another
construct, users can now use {Ref} to reference a construct
of that type that was defined in the same template.

The schema will only allow { Ref: ID }

Classes that have static methods/properties that return
a type that matches the class type can be considered "enum-like"
because they can be used like so:

    lambda.Runtime.NodeJS10

or:

    lambda.Code.asset('path')

We are now deconstructing these to either a string (for the property
case) or an object where the key is the method name and the value
is an map of parameter names to values.

This is actually something we can probably embed in the jsii spec,
as it is a common pattern.

To enable deconstruction, turn ContainerImage to an enum-like class. This means that the "image" property needs to accept a concrete class instead of an interface. Seems like this won't hurt the model in any way.

in order to be able to deconstruct this, we expect ctors to have only three arguments: scope,id,props.

split ContainerDefinitionOptions from ContainerDefinitionProps to allow
reusing them in `addContainer`.

also, move the logic of "linking" the container to the task definition
into the ContainerDefinition class, so that "addContainer" is pure
sugar and doesn't have special behavior. otherwise, we won't be able
to use it declaratively.

- ecs
- lambda
- pipelines(!)

A partition key is a required property of DynamoDB.

BREAKING CHANGE: partitionKey is now required when defining a DynamoDB table. the method "addPartitionKey" has been removed.

add SimpleTable, which is a DynamoDB table with a default partition
key of "ID: string".

SimpleTable extends from Table and support all features.

If a property accepts an interface type, deCDK will identify all types
that implement it and will formulate a JSON schema that allows users
to instantiate these types.

For example lambda IEventSource:

    "events": [
      { 
        "DynamoEventSource": { 
          "table": { "Ref": "Table" }, 
          "props": { "startingPosition": "TrimHorizon" } 
        } 
      },
      { "ApiEventSource": { "method": "GET", "path": "/hello" } },
      { "ApiEventSource": { "method": "POST", "path": "/hello" } },
      { "SnsEventSource": { "topic": { "Ref": "MyTopic" } } }
    ]

and fix "api" event source

…ed arguments