Update travis tests: Also ensure migrations work properly.

Revision to the database structure: Remove 'schedule_id'

.travis.yml - use --no-interaction rather than --force.

Try to run `migrate:install' before attempting to migrate.

chmod app/storage 777 recursively (Travis)

Update composer.lock

Move debug commands to after_script (Travis)

Update.sh - also update composer

Cannot actually update composer without root privileges. Oops!