Added alter hooks for embed placeholder context, and prior to rendering the embedded entity.
Merge branch '8.x-1.x' into embed-alter-support
Merge branch '8.x-1.x' into embed-alter-support

Conflicts:
	lib/Drupal/entity_embed/Plugin/Filter/EntityEmbedFilter.php
Fixed a couple entity_manager vs entityManager.
Fixed moduleHanlder vs moduleHandler.
Merge branch '8.x-1.x' into embed-alter-support

Conflicts:
	lib/Drupal/entity_embed/Plugin/Filter/EntityEmbedFilter.php
Allow the actual render callback to be altered and avoid using entity_view() for rendering if wanted.
Merge remote-tracking branch 'origin/8.x-1.x' into embed-alter-support

Conflicts:
	lib/Drupal/entity_embed/Plugin/Filter/EntityEmbedFilter.php
Merge pull request #15 from drupal-media/embed-alter-support

Added alter hooks for embed placeholder context and for the rendered embedded entity.