This PR was squashed before being merged into the master branch (closes #1234).
Discussion
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Added support DateTimeInterface (PHP 5.5) if available
| Q | A
| ------------- | ---
| Bug fix? | no
| New feature? | yes
| BC breaks? | no
| Deprecations? | no
| Tests pass? | yes
| Fixed tickets |
| License | new BSD
| Doc PR |
Commits
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ca61fac Added support DateTimeInterface (PHP 5.5) if available