Fix required fields on report
Issue 13: Cant start timer at 00:00.
Issue #24: Duplicate billable time entries.
Merge pull request #26 from szuster/duplicate_billable_entries

Issue #24: Duplicate billable time entries.
Merge pull request #21 from henriquelampert/report_required_fields

Fix required fields on report
Merge pull request #23 from henriquelampert/fix_timezones

Issue 13: Cant start timer at 00:00.