Updates to composer.json after forking from the original Eluceo iCal repo.
Add support for a duration property for an event instead of a dtend.
Revert "Updates to composer.json after forking from the original Eluceo iCal repo."

This reverts commit 7be90e9e67ba882775ffbe9f16b979bdc915bfcc.
Merge pull request #6 from camdram/duration

Added duration property