Add in default tasks to be consistent with tasks created on initial login
Add in default tasks to be consistent with tasks created on initial login

- Combined walk/bike distance task
- Invite friends task (currently manual)

e-mission/e-mission-server,sunil07t/e-mission-server,sunil07t/e-mission-server,e-mission/e-mission-server,shankari/e-mission-server,sunil07t/e-mission-server,e-mission/e-mission-server,e-mission/e-mission-server,sunil07t/e-mission-server,shankari/e-mission-server,shankari/e-mission-server,shankari/e-mission-server