SES: Adapt Native XS Compartment to SES Compartment

[kriskowal]

Refs: #400

Add a Compartment adapter to ses such that the SES Compartment wraps the XS native Compartment providing parity with the current ses Compartment interface using the XS native implementation.

• One of:
  - SES: Introduce XS-specific Compartment interface-parity-adapter around native Compartment such that existing usage requires no changes.
  - Refactor SES Compartment to implement the XS Native Compartment API more directly and adjust Compartment Mapper to use these new forms.
  - Refactor Compartment Mapper such that it drives ModuleSource and Module constructors directly and subsumes some dependency analysis responsibilities from Compartment.