Add possibility to bet on match, on both desktop and mobile

Non backward-compatible data changes:
- rename user.login into user.id, prefix with user.type
- update bet.user (was user.login) to be user.id

Backward-compatible data changes:
- user.name = user.name || user.login (so code can safely assume user.name is always set)
- remove bet.userType
- remove user.type
Release version v0.10.0