1.15.0: Merge pull request #281 from lucasmichot/travis-php7

Add tests (with failures) for PHP 7

1.14.0

Updated history for new version.

1.13.0

Next version

1.12.0

Ignore the lock file.

1.11.0

Updated readme.

1.10.0

Added read property for weekOfMonth and updated history for new release.

1.9.0

Released 1.9.0

1.8.0: Fixed bug in detecting relative keywords in ctor parameter when using…

… a test now

1.7.0: Moved average to the modifiers and documented. Fixed human diff defau…

…lt when null.

1.6.0: Fixed "Cannot access property ::$toStringFormat" when extending Carbo…

…n and type juggling to a string occurs.  Added supporting test.