updated docblocks and comments
Merge branch 'hotfix/4450' into develop

Forward port #4450
Merge branch 'hotfix/4441' into develop

Forward port #4441
Merge branch 'hotfix/4435' into develop

Forward port #4435
Merge branch 'hotfix/4451' into develop

Forward port #4451
Merge branch 'feature/4448' into develop

Forward port #4448
add group ability to Paginator\Adapter\DbTableGateway
add unit test
add having
PR #4427
* added better testing for DbTableGateway paginator
Merge branch 'hotfix/4454' into develop

Forward port #4454
Forward #4304
Merge branch 'fmarquis-master' into develop
Forward PR #4290
Merge branch 'YannickDa-SqlSetTable' into develop
Forward #4280
Merge branch 'AgentCoop-develop' into develop
Merge branch 'hotfix/3958' into develop

Forward port #3958
Merge branch 'releases/2.2.0rc3' into develop

2.2.0rc3 readiness
Merge branch 'version/bump' into develop

Back to dev version

Conflicts:
	README.md
	library/Zend/Version/Version.php
Add ConstantScanner and resolve scanning constants with docblock
Change method getConstants() that now return instance of ConstantScanner
Added methods for verifying if constant or property exists
Update docblocks