Merge commit 'refs/pull/3130/head' of github.com:zendframework/zf2 into hotfix/add-space-after-function-keyword
Merge pull request #3130 branch 'hotfix/add-space-after-function-keyword'
Check parameter type
remove the subscription record upon successful unsubscribe
Added check for number of paramters
Added tests
Fix issue #3374

DateTime::ISO8601 doesn't properly handle fractions of a second. This patch fixes that problem.
Workaround for DateTime::ISO8601 deficiency.

Added logic to detect and properly handle ISO8601 date strings that contain fractions of a second.
Fixed incorrect variable name
Added Zend\Stdlib\DateTime object to properly handle ISO8601 formatted dates
Adding attributes for a lightweight export
Typo
Fixed typo expected exception message
Refactored Zend\Stdlib\DateTime::createISO8601Date to Zend\Stdlib\DateTime::createFromISO8601, updated documentation
Fixed annotation of ZendTest\DateTimeTest
Fix exception message
Ran php-cs-fixer on Zend\Stdlib\DateTime.php and ZendTest\Stdlib\DateTimeTest.php
Merge pull request #3387 branch 'hotfix/typo'
Merge branch 'master', commit 'refs/pull/3391/head' of github.com:zendframework/zf2 into hotfix/typo
Merge pull request #3391 branch 'hotfix/typo'