Merge branch 'hotfix/4437' into develop
Merge branch 'hotfix/4373' into develop

Forward port #4373
Merge branch 'hotfix/readme-updates' into develop

Conflicts:
	README.md
Merge branch 'hotfix/4444' into develop

Forward Port #4444
Implementing first mockup of aggregate hydrator as of zendframework/zf2#3829
Reusing hydration events in the aggregate hydrator
Removing unused constants/imports
Unit tests for the aggregate hydrator
Unit tests for the hydrate event
Extract event unit tests
Adding tests for the hydration listener
Adding integration tests for the aggregate hydrator
Using `array_merge` instead of
Adding event identifiers for the aggregate hydrator
CS fixes and docblocks for the aggregate hydrator namespace
Adding suggested dependency to zendframework/zend-eventmanager
CS fix (EOF EOL)
Merge pull request #4448 from Ocramius/feature/aggregate-hydrator

[WIP] Aggregate hydrator
Merge branch 'feature/4448'

Close #4448
Close #3829