Adding in Callback for #3371
Merge remote-tracking branch 'kit10/zf-3371' into zf-3371
Merge commit 'be3e2c48318ff9c5820256a14e2d7ab16b00a1f2' into zf-3371
Fixed prepared statement params
Added test for credential validation callback
Merge branch 'zf-3371' of github.com:youngguns-nl/zf2 into zf-3371
Removed callable type hint since this is PHP 5.4 only
Throw an exception if an invalid callback is provided
DocBlock fixes
Merge branch 'master' of https://github.com/zendframework/zf2 into zf-3371
Merge branch 'zf-3371' of github.com:youngguns-nl/zf2 into zf-3371
Adding in Callback for #3371
Fixed prepared statement params
Added test for credential validation callback
Removed callable type hint since this is PHP 5.4 only
Throw an exception if an invalid callback is provided
DocBlock fixes
Merge branch 'zf-3371' of github.com:youngguns-nl/zf2 into zf-3371

Conflicts:
	library/Zend/Authentication/Adapter/DbTable.php
Refactored #3490. Split DbTable into 2 different (CallbackCheck and CredentialTreatment) adapters
Removed '_' prefixes from non public API function names