[wip] initial prototype
Add note
Update tests
Add new tests
Rename BlockExecutionContext => BlockContext
Allow the manager to be defined in the configuration
Update phpdocs
Fix unit test
Fix debug console
Add setter for settings
Merge branch 'master' into add_block_context

Conflicts:
	Block/TraceableBlockRenderer.php
	Tests/Block/TraceableBlockRendererTest.php
Fix useless code due to the BlockContextManager
Fix typo