Release 3.29.0 rc1

### Fixed Bugs:
- Move config/config.js to config/environment.js to prevent confusion.
- Fix broken link to configuration in docs.
- Include destination tag on outgoing payments if provided

### Added Features:

- Automatically set LAST_PAYMENT_HASH if not provided
- Update admin webapp to use new styles, behavior, rename to gatewayd-admin
- Include setup wizard with comments in Gatewaydfile
- New database configuration scheme from environment / config variables
- Add enqueue_outgoing_payment CLI command
- Add Bridge REST resource
- Add bluebird Promise library dependency
- Add address, type to external_accounts
- Add global export (gatewayd.database) of the sequelize.js db object
- Default config.WEBAPP to true