Add expire option to reminder config.
Added array validation language lines.
Update comment for clarity
More clarity
Merge pull request #2237 from mmeyer2k/patch-2

Update comment for clarity
Add missing license information in composer.json

The license information was missing from the composer.json file. This information is quite important as it is displayed on Packagist and used by automated tools (like http://insight.sensiolabs.com/ for instance) to check compatibility of your project dependencies.
Merge pull request #2278 from fabpot/patch-1

Add missing license information in composer.json
added note about expiry time on reminders.
Merge branch 'master' into develop