Define applicability of Move/Copy/Link using appliesTo, to avoid
errors being thrown due to lack of context during instantiation.
Addresses immediate cause of nasa/openmctweb#120.
The entanglement bundle defines move, copy, and link actions, and
exposes them as context menu actions.
* The Move action moves an object from it's current parent to a new
parent object.
* The Copy action deep-copies an object to a new parent object.
* The Link action links an object to a new parent object.
These actions are implemented by three new services: moveService,
copyService, and linkService.
Mocks are provided for each service for easy testing of components
that depend on them.
Additionally, this bundle provides a DomainObjectFactory that simplifies
the construction of mockDomainObjects for tests.
These actions are exposed to the user as context menu options.
